Quantum Connections in Sweden-11 Summer School

11 Jun 2023, 05:00 → 24 Jun 2023, 12:00 Europe/Stockholm

Fåhraeus salen (Högberga Gård)

Frank Wilczek (Stockholm University)

Venue

Högberga Gård, Lidingö, Sweden

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Scope

The Quantum Connections 2023 is part of the Quantum Connections series of scientific events, a summer school that is organized for graduate students and postdocs, both theoretical and experimental, in all aspects of quantum frontiers.

Quantum Connectionsevents are organized jointly by the Department of Physics and Nordita (hosted by Stockholm University, KTH-Royal Institute of Technology, and Uppsala University), together with TD Lee Institute and Wilczek Quantum Center at Shanghai Jiao Tong University.

Curriculum: Short courses covering developments of modern physics widely from the frontline quantum matter and information to the forefront of particle physics and all the way to the fundamental structure of matter. There will also be a short celebration commemorating the discovery of QCD some 50 years ago.

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Invited Lecturers

Name	Affiliation
Prof. Michael Creutz	Brookhaven National Laboratory
Prof. Artur Ekert	University of Oxford Okinawa Institute of Science and Technology Graduate University National University of Singapore
Prof. Andrew Fisher	University College London
Prof. Zoltan Fodor	Pennsylvania State University
Prof. Martin Greiter	University of Würzburg
Prof. David Gross	KITP - UC Santa Barbara
Prof. Barbara Jacak	UC Berkeley
Prof. Henrik Johansson	Nordita / Uppsala University
Prof. Andrew Jordan	Chapman University
Prof. Igor Klebanov	Princeton University
Prof. David A. Kosower	CEA Paris-Saclay University
Prof. Mikhail Lukin	Harvard University
Prof. Krishna Rajagopal	Massachusetts Institute of Technology
Prof. Gerard ′t Hooft	Utrecht University
Prof. Frank Wilczek	Stockholm University
Prof. Smitha Vishveshwara	University of Illinois at Urbana-Champaign
Prof. Peter Zoller	University of Innsbruck

 

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Poster

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Accommodation

For the "non-local" participants who don't live in the Stockholm area, we will provide accommodation at the summer school's venue and will send the information to those participants individually.

Please be aware that unfortunately, scammers sometimes approach participants claiming to be able to provide accommodation and asking for credit card details. Please do not give this information to them. For invited speakers and also successful applicants, organazers will always be in touch via email regarding accommodation. If you are in any doubt about the legitimacy of an approach, please contact organizers via e-mail quantum.connections@fysik.su.se

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Application

The intended audience is Ph.D. students and junior researchers in quantum phenomena and condensed matter physics.

You apply to the Quantum Connections School in two steps:

1. Fill in the APPLICATION FORM in the menu to the left
2. Ask your supervisor or another reference person to send a recommendation letter via e-mail to:quantum.connections@fysik.su.se. The subject line should contain: "QC2023" "Name of the applicant".

Both steps must be completed by March 30, 2023.

You will be informed by the organizers shortly after the application deadline whether your application has been approved or not. Due to space restrictions, the total number of participants is strictly limited.

There is no registration fee. We will cover the local expenses (housing, meals, airport transfer) for non-local participants during the school. Participants cover their own travel expenses to Stockholm.

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The Organizing Committee

• Egor Babaev	KTH-Royal Institute of Technology, Stockholm
• Emil Bergholtz	Stockholm University, Stockholm
• Hans Hansson	Stockholm University, Stockholm
• Wei Ku	Shanghai Jiaotong University, Shanghai
• Sreenath K Manikandan	Stockholm University/Nordita, Stockholm
• Antti Niemi (Scientific Coordinator)	Stockholm University/Nordita, Stockholm
• Pouya Peighami (Event Coordinator)	Stockholm University, Stockholm
• Igor Pikovski	Stockholm University, Stockholm
• Sofia Qvarfort	Stockholm University/Nordita, Stockholm
• Frank Wilczek (Chair)	Stockholm University, Stockholm
• Biao Wu	Peking University, Beijing

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Sponsored By

 

 

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Contact

quantum.connections@fysik.su.se

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Sunday 11 June

05:00 Check-in (for participants from abroad and lecturers)

Monday 12 June

08:00 Registration

1 Opening Session and information from organizers

Speaker: Frank Wilczek (Stockholm University)

2 Bell inequalities: From Curiosity to Security

Bell inequalities's journey from rags to riches of quantum theory was a long one. Proposed by John Bell in 1964, the inequalities were designed to check whether quantum theory, with its inherent statistical predictions, is a complete description of physical reality or whether it is just a provisional construct, with an underlying hidden structure which, once discovered, would offer precise predictions. The subsequent pioneering experiments of outliers, such as John Clauser (1972) and Alain Aspect (1982), showed that Bell's inequalities can be violated. However, these experiments were barely noticed at that time.
Quantum theory is admittedly strange, but it worked and the research community just carried on using it in an instrumental way, making successful statistical predictions while avoiding anything related to their interpretations.
Bell inequalities were viewed as a philosophical topic with no practical value and hence not worthy of the attention of serious scientists.
When Bell inequalities snagged my imagination, I was just a PhD student with nothing to lose. In 1991, I reformulated Bell inequalities as the test for eavesdropping in cryptography, paving the way for the most secure communication systems to date, known as the device independent quantum key distribution.
The new narrative around Bell inequalities created an additional motivation to close all possible loopholes in the previous experiments.
In the new context it seemed reasonable. Nature would have to be very malicious if it were to cheat selectively; on locality in some experiments and exploring detection loopholes in some others.
In contrast, an eavesdropper has all the rights to be malicious. Closing the loopholes posed an experimental challenge but gradually, due to the efforts of several experimental groups, to mention only those of Ronald Hansen (2015) and Anton Zeilinger (2015), the loopholes were closed (albeit not all of them in the same experiment) and device independent cryptography became a realistic experimental proposition. Cryptography offered a lifeline to quantum foundations and in return the experimental tools developed to pursue esoteric philosophical questions gave cryptography unprecedented security.
The curiosity and perseverance of the few brave souls who made this happen (and who are still alive) were finally rewarded with the 2022 Nobel Prize in Physics.

Speaker: Prof. Artur Ekert

Lecture Materials

• QC23_Ekert_Cardano.pdf
• QC23_Ekert_Functionals.pdf
• QC23_Ekert_lecture_1_2.pdf

Recorded lecture L1_Artur_Ekert_230612_0930.mp4

10:30 Coffee Break

3 Bell inequalities: From Curiosity to Security

Bell inequalities's journey from rags to riches of quantum theory was a long one. Proposed by John Bell in 1964, the inequalities were designed to check whether quantum theory, with its inherent statistical predictions, is a complete description of physical reality or whether it is just a provisional construct, with an underlying hidden structure which, once discovered, would offer precise predictions. The subsequent pioneering experiments of outliers, such as John Clauser (1972) and Alain Aspect (1982), showed that Bell's inequalities can be violated. However, these experiments were barely noticed at that time.
Quantum theory is admittedly strange, but it worked and the research community just carried on using it in an instrumental way, making successful statistical predictions while avoiding anything related to their interpretations.
Bell inequalities were viewed as a philosophical topic with no practical value and hence not worthy of the attention of serious scientists.
When Bell inequalities snagged my imagination, I was just a PhD student with nothing to lose. In 1991, I reformulated Bell inequalities as the test for eavesdropping in cryptography, paving the way for the most secure communication systems to date, known as the device independent quantum key distribution.
The new narrative around Bell inequalities created an additional motivation to close all possible loopholes in the previous experiments.
In the new context it seemed reasonable. Nature would have to be very malicious if it were to cheat selectively; on locality in some experiments and exploring detection loopholes in some others.
In contrast, an eavesdropper has all the rights to be malicious. Closing the loopholes posed an experimental challenge but gradually, due to the efforts of several experimental groups, to mention only those of Ronald Hansen (2015) and Anton Zeilinger (2015), the loopholes were closed (albeit not all of them in the same experiment) and device independent cryptography became a realistic experimental proposition. Cryptography offered a lifeline to quantum foundations and in return the experimental tools developed to pursue esoteric philosophical questions gave cryptography unprecedented security.
The curiosity and perseverance of the few brave souls who made this happen (and who are still alive) were finally rewarded with the 2022 Nobel Prize in Physics.

Speaker: Artur Ekert

Lecture Materials

• QC12_Ekert_Cardano.pdf
• QC23_Ekert_Functionals.pdf
• QC23_Ekert_lecture_1_2.pdf

Recorded lecture L2_Artur_Ekert_230612_1045.mp4

11:45 Lunch Break/Discussions

4 The doped-atom toolbox for quantum simulation and computation

I will describe the developing experimental tools of atomically controlled defect implantation in semiconductors using scanning tunneling microscopy (STM) lithography and how the resulting nanostructures can be used to implement a range of controlled quantum systems within the material. I will cover applications both in quantum computation (including the initialization and readout of qubits and the implementation of universal sets of unitary gates) and in the realization/simulation of archetypal models in condensed matter physics (including disordered quantum transport, the Mott transition, and topologically non-trivial insulators in one and two dimensions). I will compare this dopant-based toolbox with other techniques and give some outlooks for future development.

Speaker: Andrew Fisher

Lecture Materials QC23_Fisher_lectures.pdf

Recorded Lecture L3_Andrew_Fisher_230612_1300.mp4

13:50 Break

5 The doped-atom toolbox for quantum simulation and computation

Speaker: Andrew Fisher

Lecture Materials QC23_Fisher_lectures.pdf

Recorded Lecture L4_Andrew_Fisher_230612_1410.mp4

15:00 Coffee Break

6 QCD Matter in Collisions of Heavy Ions

Heavy ion collisions reproduce droplets of the trillions-of-degrees-hot liquid that filled the microseconds-old universe, called quark-gluon plasma (QGP). Experiments at RHIC and the LHC have gathered extensive data about this plasma, showing that it flows with very low viscosity per particle and that it is very opaque to colored probes. I will show how we can measure and understand the dynamics of this complex many-body system, and extract transport properties of QCD matter from the data. Experimental observables we study include collective flows, electromagnetic radiation, and the effect of interactions with plasma on hard probes such as heavy quarks and jets. Jet substructure offers a particularly promising way to map the evolution of quarks and gluons to the hadrons seen in detectors. I will also discuss how the future Electron-Ion Collider will probe QCD in the cold, dense gluonic matter in the heart of nuclei.

Speaker: Barbara Jacak

Lecture Materials QC23_JACAK_Lecture1.pdf

Recorded Lecture L5_Barbara_Jacak_230612_1530.mp4

16:20 Break

7 QCD Matter in Collisions of Heavy Ions

Heavy ion collisions reproduce droplets of the trillions-of-degrees-hot liquid that filled the microseconds-old universe, called quark-gluon plasma (QGP). Experiments at RHIC and the LHC have gathered extensive data about this plasma, showing that it flows with very low viscosity per particle and that it is very opaque to colored probes. I will show how we can measure and understand the dynamics of this complex many-body system, and extract transport properties of QCD matter from the data. Experimental observables we study include collective flows, electromagnetic radiation, and the effect of interactions with plasma on hard probes such as heavy quarks and jets. Jet substructure offers a particularly promising way to map the evolution of quarks and gluons to the hadrons seen in detectors. I will also discuss how the future Electron-Ion Collider will probe QCD in the cold, dense gluonic matter in the heart of nuclei.

Speaker: Barbara Jacak

Lecture Materials QC23_JACAK_Lecture2.pdf

Recorded Lecture L6_Barbara_Jacak_230612_1640.mp4

17:30 Break

Q&A: Arthur Ekert - Andrew Fisher - Barbara Jacak

Recorded Lecture Q&A_Ekert_Fisher_Jacak_230612_1745.mp4

18:40 Welcome Drinks followed by Dinner

Tuesday 13 June

8 General quantum measurements

This survey series of lectures on quantum measurement starts with textbook quantum measurement followed by the von Neumann model for measurement as a physical process. The discussion will transition into the theory of weak measurement in the very weak coupling limit. Generalized measurement is then characterized by imperfect correlation between system and meter, and describable with positive operators. Motivating physical examples will be given.

Speaker: Andrew Jordan (Chapman University)

Lecture Materials QC23_Jordan_lecture_1.pdf QC23_Jordan_lecture_WB.pdf

Recorded Lecture L1_Andrew_Jordan_230613_0930.mp4

10:30 Break

9 Continuous measurements: diffusion and jumps

Repeated weak measurements give rise to a stochastic process. I will introduce both diffusive and quantum jump trajectories of monitored quantum systems. Physical realizations of continuous monitoring will be given, motivating the mathematical description of quantum state collapse as a stochastic differential equation or stochastic path integral. Comparisons with experimental data will be discussed.

Speaker: Andrew Jordan (Chapman University)

Lecture Materials QC23_Jordan_lecture_2.pdf

Recorded Lecture L2_Andrew_Jordan_230613_1045.mp4

11:45 Lunch Break

10 Adventures in Lattice Fermions: Many-Body Scars and the Schwinger Model

Speaker: Igor Klebanov

Lecture Materials

• QC23_Klebanov_Lecture20230613.pdf
• QC23_Klebanov_Lecture20230613_WB1.pdf
• QC23_Klebanov_lecture20230613_WB2.pdf

Recorded Lecture L3_Igor_Klebanov_230613_1300.mp4

13:50 Break

11 Adventures in Lattice Fermions: Many-Body Scars and the Schwinger Model

Speaker: Igor Klebanov

Lecture Materials

• QC23_Klebanov_Lecture20230613.pdf
• QC23_Klebanov_Lecture20230613_WB1.pdf
• QC23_Klebanov_lecture20230613_WB2.pdf

15:00 Coffee break

12 T symmetry and its violation: Fundamentals

The study of time-reversal symmetry (T) has played a major role in the history of physics and is central to several frontier of research today. In this series of lectures, I will review the foundations of our current understanding and then both critique and build on that understanding.
The series will have four parts. In Part 1 I will introduce basic concepts in increasingly rich contexts, building up to the standard model, where I’ll demonstrate the great result that approximate T symmetry is a “semi-accidental” consequence of deeper principles. In Part 2 I will expose a very specific and profound limitation of that result, connected to quantum anomalies. Closing that loophole leads us to suggest the existence of a new kind of particle, the axion, which has become a leading candidate to provide the dark matter of the universe and is presently inspiring many investigations. In the third part I will discuss phenomenological implications of T in physics, including applications both to fundamental physics and to materials. In the fourth part I will discuss how and in what sense biology breaks spatial parity P at the molecular level, and pose the analogous questions for T.

Speaker: Frank Wilczek (Stockholm University)

Lecture Materials QC23_Wilczek_1.pdf

Recorded Lecture L5_Frank_Wilczek_230613_1530.mp4

16:20 Break

13 T symmetry and its violation: Anomalies and Axions

The study of time-reversal symmetry (T) has played a major role in the history of physics and is central to several frontier of research today. In this series of lectures, I will review the foundations of our current understanding and then both critique and build on that understanding.
The series will have four parts. In Part 1 I will introduce basic concepts in increasingly rich contexts, building up to the standard model, where I’ll demonstrate the great result that approximate T symmetry is a “semi-accidental” consequence of deeper principles. In Part 2 I will expose a very specific and profound limitation of that result, connected to quantum anomalies. Closing that loophole leads us to suggest the existence of a new kind of particle, the axion, which has become a leading candidate to provide the dark matter of the universe and is presently inspiring many investigations. In the third part I will discuss phenomenological implications of T in physics, including applications both to fundamental physics and to materials. In the fourth part I will discuss how and in what sense biology breaks spatial parity P at the molecular level, and pose the analogous questions for T.

Speaker: Frank Wilczek (Stockholm University)

Lecture Materials QC23_Wilczek_2.pdf

Recorded Lecture L6_Frank_Wilczek_230613_1640.mp4

17:30 Break

Q&A: Andrew Jordan – Igor Klebanov - Frank Wilczek

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

19:00 Dinner

Wednesday 14 June

14 Bell inequalities: From Curiosity to Security

Bell inequalities's journey from rags to riches of quantum theory was a long one. Proposed by John Bell in 1964, the inequalities were designed to check whether quantum theory, with its inherent statistical predictions, is a complete description of physical reality or whether it is just a provisional construct, with an underlying hidden structure which, once discovered, would offer precise predictions. The subsequent pioneering experiments of outliers, such as John Clauser (1972) and Alain Aspect (1982), showed that Bell's inequalities can be violated. However, these experiments were barely noticed at that time.
Quantum theory is admittedly strange, but it worked and the research community just carried on using it in an instrumental way, making successful statistical predictions while avoiding anything related to their interpretations.
Bell inequalities were viewed as a philosophical topic with no practical value and hence not worthy of the attention of serious scientists.
When Bell inequalities snagged my imagination, I was just a PhD student with nothing to lose. In 1991, I reformulated Bell inequalities as the test for eavesdropping in cryptography, paving the way for the most secure communication systems to date, known as the device independent quantum key distribution.
The new narrative around Bell inequalities created an additional motivation to close all possible loopholes in the previous experiments.
In the new context it seemed reasonable. Nature would have to be very malicious if it were to cheat selectively; on locality in some experiments and exploring detection loopholes in some others.
In contrast, an eavesdropper has all the rights to be malicious. Closing the loopholes posed an experimental challenge but gradually, due to the efforts of several experimental groups, to mention only those of Ronald Hansen (2015) and Anton Zeilinger (2015), the loopholes were closed (albeit not all of them in the same experiment) and device independent cryptography became a realistic experimental proposition. Cryptography offered a lifeline to quantum foundations and in return the experimental tools developed to pursue esoteric philosophical questions gave cryptography unprecedented security.
The curiosity and perseverance of the few brave souls who made this happen (and who are still alive) were finally rewarded with the 2022 Nobel Prize in Physics.

Speaker: Prof. Artur Ekert (University of Oxford, Okinawa Institute of Science and Technology Graduate University, National University of Singapore)

Lecture Materials

• QC12_Ekert_Cardano.pdf
• QC23_Ekert_Functionals.pdf
• QC23_Ekert_lecture_3_4.pdf

Recorded Lecture L1_Artur_Ekert_230614_0930.mp4

10:30 Coffee Break

15 Bell inequalities: From Curiosity to Security

Bell inequalities's journey from rags to riches of quantum theory was a long one. Proposed by John Bell in 1964, the inequalities were designed to check whether quantum theory, with its inherent statistical predictions, is a complete description of physical reality or whether it is just a provisional construct, with an underlying hidden structure which, once discovered, would offer precise predictions. The subsequent pioneering experiments of outliers, such as John Clauser (1972) and Alain Aspect (1982), showed that Bell's inequalities can be violated. However, these experiments were barely noticed at that time.
Quantum theory is admittedly strange, but it worked and the research community just carried on using it in an instrumental way, making successful statistical predictions while avoiding anything related to their interpretations.
Bell inequalities were viewed as a philosophical topic with no practical value and hence not worthy of the attention of serious scientists.
When Bell inequalities snagged my imagination, I was just a PhD student with nothing to lose. In 1991, I reformulated Bell inequalities as the test for eavesdropping in cryptography, paving the way for the most secure communication systems to date, known as the device independent quantum key distribution.
The new narrative around Bell inequalities created an additional motivation to close all possible loopholes in the previous experiments.
In the new context it seemed reasonable. Nature would have to be very malicious if it were to cheat selectively; on locality in some experiments and exploring detection loopholes in some others.
In contrast, an eavesdropper has all the rights to be malicious. Closing the loopholes posed an experimental challenge but gradually, due to the efforts of several experimental groups, to mention only those of Ronald Hansen (2015) and Anton Zeilinger (2015), the loopholes were closed (albeit not all of them in the same experiment) and device independent cryptography became a realistic experimental proposition. Cryptography offered a lifeline to quantum foundations and in return the experimental tools developed to pursue esoteric philosophical questions gave cryptography unprecedented security.
The curiosity and perseverance of the few brave souls who made this happen (and who are still alive) were finally rewarded with the 2022 Nobel Prize in Physics.

Speaker: Artur Ekert

Lecture Materials

• QC12_Ekert_Cardano.pdf
• QC23_Ekert_Functionals.pdf
• QC23_Ekert_lecture_3_4.pdf

Recorded Lecture L2_Artur_Ekert_230614_1045.mp4

11:45 Lunch Break

16 The doped-atom toolbox for quantum simulation and computation

Speaker: Andrew Fisher

Lecture Materials QC23_Fisher_lectures.pdf

Recorded Lecture L3_Andrew_Fisher_230614_1300.mp4

13:50 Break

17 The doped-atom toolbox for quantum simulation and computation

Speaker: Andrew Fisher

Lecture Materials QC23_Fisher_lectures.pdf

Recorded Lecture L4_Andrew_Fisher_230614_1410.mp4

15:00 Coffee Break

18 Emergent Axion response in metamaterials

Speaker: Maxim Gorlach

Lecture Materials QC23_Gorlach_lecture.pdf

Recorded Lecture L5_Maxim_Gorlach_230614_1515.mp4

Q&A: Arthur Ekert - Andrew Fisher - Maxim Gorlach

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

17:30 BBQ Dinner and Game Night

Thursday 15 June

19 Quantum amplification and linear detectors

Quantum physics allows amplification, but puts stringent requirements on how the amplification can be carried out. Beginning with theoretical preliminaries of how much noise a quantum limited amplifier must add to the measured signal, I will overview the linear response theory of detectors, and give examples of amplifier designs in superconducting circuits.

Speaker: Andrew Jordan (Chapman University)

Lecture Materials QC23_ Jordan_3_WB.pdf QC23_Jordan_lecture_3.pdf

Recorded Lecture L1_Andrew_Jordan_230615_0930.mp4

10:30 Break

20 Measurement related phenomena and applications

The last lecture will survey some of the fascinating phenomena associated with quantum measurement. These include the possibility of reversing a weak measurement, entanglement of distant objects by a joint measurement process, and feedback control of continuously monitored quantum systems.

Speaker: Andrew Jordan (Chapman University)

Lecture Materials QC23_Jordan_4_WB.pdf QC23_Jordan_lecture_4.pdf

Recorded Lecture L2_Andrew_Jordan_230615_1045.mp4

11:45 Lunch Break

21 Adventures in Lattice Fermions: Many-Body Scars and the Schwinger Model

Speaker: Igor Klebanov

Lecture Materials QC23_Klebanov_Lecture20230615.pdf QC23_Klebanov_Lecture20230615_WB.pdf

Recorded Lecture L3_Igor_Klebanov_230615_1300.mp4

13:50 Break

22 Adventures in Lattice Fermions: Many-Body Scars and the Schwinger Model

Speaker: Igor Klebanov

Lecture Materials QC23_Klebanov_Lecture20230615.pdf QC23_Klebanov_Lecture20230615_WB.pdf

Recorded Lecture L4_Igor_Klebanov_230615_1410.mp4

15:00 Coffee Break

23 T symmetry and its violation: Applications in physics

The study of time-reversal symmetry (T) has played a major role in the history of physics and is central to several frontier of research today. In this series of lectures, I will review the foundations of our current understanding and then both critique and build on that understanding.
The series will have four parts. In Part 1 I will introduce basic concepts in increasingly rich contexts, building up to the standard model, where I’ll demonstrate the great result that approximate T symmetry is a “semi-accidental” consequence of deeper principles. In Part 2 I will expose a very specific and profound limitation of that result, connected to quantum anomalies. Closing that loophole leads us to suggest the existence of a new kind of particle, the axion, which has become a leading candidate to provide the dark matter of the universe and is presently inspiring many investigations. In the third part I will discuss phenomenological implications of T in physics, including applications both to fundamental physics and to materials. In the fourth part I will discuss how and in what sense biology breaks spatial parity P at the molecular level, and pose the analogous questions for T.

Speaker: Frank Wilczek (Stockholm University)

Lecture Materials QC23_Wilczek_3.pdf

Recorded Lecture L5_Frank_Wilczek_230615_1530.mp4

16:20 Break

24 T symmetry and it's violation: P and T in biology

The study of time-reversal symmetry (T) has played a major role in the history of physics and is central to several frontier of research today. In this series of lectures, I will review the foundations of our current understanding and then both critique and build on that understanding.
The series will have four parts. In Part 1 I will introduce basic concepts in increasingly rich contexts, building up to the standard model, where I’ll demonstrate the great result that approximate T symmetry is a “semi-accidental” consequence of deeper principles. In Part 2 I will expose a very specific and profound limitation of that result, connected to quantum anomalies. Closing that loophole leads us to suggest the existence of a new kind of particle, the axion, which has become a leading candidate to provide the dark matter of the universe and is presently inspiring many investigations. In the third part I will discuss phenomenological implications of T in physics, including applications both to fundamental physics and to materials. In the fourth part I will discuss how and in what sense biology breaks spatial parity P at the molecular level, and pose the analogous questions for T.

Speaker: Frank Wilczek (Stockholm University)

Lecture Materials QC23_Wilczek_3-4.pdf

Recorded Lecture L6_Frank_Wilczek_230615_1640.mp4

17:30 Break

Q&A: Andrew Jordan - Igor Klebanov - Frank Wilczek

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

18:40 Conference Dinner and Pool, Sauna, Jacuzzi

Friday 16 June

25 Programmable Quantum Simulators

Speaker: Peter Zoller

Lecture Materials QC23_Zoller_Lecture_1.pdf

Recorded Lecture L1_Peter_Zoller_230616_0930.mp4

10:30 Coffee Break

26 Programmable Quantum Simulators

Speaker: Peter Zoller

Lecture Materials QC23_Zoller_Lecture_2.pdf

Recorded Lecture L2_Peter_Zoller_230616_1045.mp4

11:45 Lunch Break

27 QCD Matter in Collisions of Heavy Ions

Heavy ion collisions reproduce droplets of the trillions-of-degrees-hot liquid that filled the microseconds-old universe, called quark-gluon plasma (QGP). Over the past twenty years, data obtained via recreating this primordial fluid have shown that it is the most liquid liquid in the universe, making it the first complex matter to form as well as the source of all protons and neutrons. After a look at what we have learned about the formation and properties of this original liquid from heavy ion collisions, I will focus on the road ahead. I will frame questions that motivate experimental measurements coming soon, including: How does liquid QGP change as it is doped with an excess of quarks over antiquarks? Is there a critical point in the region of the QCD phase diagram as a function of temperature and doping that heavy ion collisions can explore? How does a strongly coupled liquid emerge, given that what you will see if you can probe QGP with high resolution is weakly coupled quarks and gluons? How can we use jets to see the inner workings of QGP and answer this question?

Speaker: Barbara Jacak

Lecture Materials QC23_JACAK_Lecture3.pdf

Recorded Lecture L3_Barbara_Jacak_230616_1300.mp4

13:50 Break

28 QCD Matter in Collisions of Heavy Ions

Heavy ion collisions reproduce droplets of the trillions-of-degrees-hot liquid that filled the microseconds-old universe, called quark-gluon plasma (QGP). Over the past twenty years, data obtained via recreating this primordial fluid have shown that it is the most liquid liquid in the universe, making it the first complex matter to form as well as the source of all protons and neutrons. After a look at what we have learned about the formation and properties of this original liquid from heavy ion collisions, I will focus on the road ahead. I will frame questions that motivate experimental measurements coming soon, including: How does liquid QGP change as it is doped with an excess of quarks over antiquarks? Is there a critical point in the region of the QCD phase diagram as a function of temperature and doping that heavy ion collisions can explore? How does a strongly coupled liquid emerge, given that what you will see if you can probe QGP with high resolution is weakly coupled quarks and gluons? How can we use jets to see the inner workings of QGP and answer this question?

Speaker: Barbara Jacak

Lecture Materials QC23_JACAK_Lecture3.pdf

Recorded Lecture L4_Barbara_Jacak_230616_1410.mp4

15:00 Coffee Break

29 Eigenstate Thermalization, Interlinking and the Emergence of Classical Physics in Quantum Theory

Speaker: Martin Greiter

Lecture Materials QC23_Gretier_Lectures.pdf

Recorded Lecture L5_Martin_Greiter_230616_1530.mp4

16:20 Break

30 Eigenstate Thermalization, Interlinking and the Emergence of Classical Physics in Quantum Theory

Speaker: Martin Greiter

Lecture Materials QC23_Gretier_Lectures.pdf

Recorded Lecture L6_Martin_Greiter_230616_1640.mp4

17:30 Break

Q&A: Peter Zoller - Barbara Jacak - Martin Greiter

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

19:00 Dinner and social activities

Saturday 17 June

11:45 Lunch break

13:00 Social activities - Excursion. Assembly point: 13:05 (sharp) at the parking lot. Boat from Breviks harbor at 13:30 to Kastellet Waxholm, arrival at 14:00. Guided tour of Waxholm Castle from 14:00 to 15:00. You will be picked up at the boat. The cable ferry to Waxholm runs twice an hour. You can take either the one at 15:00 or 15:30. Guided tour of Waxholm from 16:00 to 17:00. Dinner at Waxholms Hotell at 18:00. Boat from Waxholm at 20:00, arrival at Breviks Harbor at 20:30. Recommendation: Bring a sun hat, sunglasses, comfortable shoes, and a light jacket for windy conditions on the boat. Elizabeth Yang, from Nordita, is responsible for the excursion.

Sunday 18 June

07:00 Free time (please see the notes for the details)

On Sunday we will have no activities and you are free to make any arrangement on your own.

Breakfast will be served by the hotel as usual, but no lunch and dinner will be served for those who decide to stay at the hotel. You are responsible for your meals on Sunday.

Monday 19 June

31 T symmetry and it's violation: P and T in biology

The study of time-reversal symmetry (T) has played a major role in the history of physics and is central to several frontier of research today. In this series of lectures, I will review the foundations of our current understanding and then both critique and build on that understanding.
The series will have four parts. In Part 1 I will introduce basic concepts in increasingly rich contexts, building up to the standard model, where I’ll demonstrate the great result that approximate T symmetry is a “semi-accidental” consequence of deeper principles. In Part 2 I will expose a very specific and profound limitation of that result, connected to quantum anomalies. Closing that loophole leads us to suggest the existence of a new kind of particle, the axion, which has become a leading candidate to provide the dark matter of the universe and is presently inspiring many investigations. In the third part I will discuss phenomenological implications of T in physics, including applications both to fundamental physics and to materials. In the fourth part I will discuss how and in what sense biology breaks spatial parity P at the molecular level, and pose the analogous questions for T.

Speaker: Frank Wilczek

Lecture Materials QC23_Wilczek_4.pdf

Recorded Lecture L1_Frank_Wilczek_230619_0930.mp4

10:30 Coffee Break

32 Programmable Quantum Simulators

Speaker: Peter Zoller

Lecture Materials QC23_Zoller_Lecture_3.pdf

Recorded Lecture L2_Peter_Zoller_230619_1045.mp4

11:45 Lunch Break

33 Doping and Probing the Original Liquid

Speaker: Krishna Rajagopal

Lecture Materials QC23_Rajagopal_Lectures_v2.pdf

Recorded Lecture L3_Krishna_Rajagopal_230619_1300.mp4

13:50 Break

34 Doping and Probing the Original Liquid

Speaker: Krishna Rajagopal

Lecture Materials QC23_Rajagopal_Lectures_v2.pdf

Recorded Lecture L4_Krishna_Rajagopal_230619_1410.mp4

15:00 Coffee Break

35 Introduction to Scattering Amplitudes

I will present a brief introduction to modern methods for computing scattering amplitudes. I will cover the basics of spinor kinematics and construction of three-point amplitudes. I will also discuss color decomposition. I will discussion factorization and present the Britto-Cachazo-Feng-Witten on-shell recursion relations. Time permitting, I will also present a brief glimpse of the unitarity method.

Speaker: David Kosower

Lecture Materials QC23_Kosower_Lecture_1+2.pdf

Recorded Lecture L5_David_Kosower_230619_1530.mp4

16:30 Break

36 Introduction to Scattering Amplitudes

I will present a brief introduction to modern methods for computing scattering amplitudes. I will cover the basics of spinor kinematics and construction of three-point amplitudes. I will also discuss color decomposition. I will discussion factorization and present the Britto-Cachazo-Feng-Witten on-shell recursion relations. Time permitting, I will also present a brief glimpse of the unitarity method.

Speaker: David Kosower

Lecture Materials QC23_Kosower_Lecture_1+2.pdf

Recorded Lecture L6_David_Kosower_230619_1650.mp4

17:30 Break

Q&A: Question/Answer (Wilczek - Zoller - Rajagopal - Kosower)

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

18:40 Dinner

Tuesday 20 June

37 Introduction to Scattering Amplitudes

Speaker: David Kosower

Lecture Materials QC23_Kosower_Lecture_3.pdf

Recorded Lecture L1_David_Kosower_230620_0930.mp4

10:30 Coffee Break

38 The Gravitational Double Copy and Spin

Speaker: Henrik Johansson

Lecture Materials QC23_Johansson_Lecture_1.pdf

Recorded Lecture L2_Henrik_Johansson_230620_1045.mp4

11:45 Lunch Break

39 The Gravitational Double Copy and Spin

Speaker: Henrik Johansson

Lecture Materials QC23_ Johansson_Lecture1-2.pdf

Recorded Lecture L3_Henrik_Johansson_230620_1300.mp4

13:50 Break

40 The Gravitational Double Copy and Spin

Speaker: Henrik Johansson

Lecture Materials QC23_Johansson_Lecture_2.pdf

Recorded Lecture L4_Henrik_Johansson_230620_1410.mp4

15:00 Coffee Break

41 Quantum Field Theory on the Lattice

Speaker: Zoltan Fodor

Lecture Materials QC23_Zoltan_Fodor_L1.pdf

Recorded Lecture L5_Zoltan_Fodor_230620_1530.mp4

16:20 Break

42 Quantum Field Theory on the Lattice

Speaker: Zoltan Fodor

Lecture Materials QC23_Zoltan_Fodor_L2.pdf

Recorded Lecture L6_Zoltan_Fodor_230620_1640.mp4

17:30 Break

Q&A: Question/Answer (Kosower – Johansson - Fodor)

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

18:40 Dinner

Wednesday 21 June

43 Can standard quantum field theories have an ontological origin?

Speaker: Gerard 'tHooft

Lecture Materials QC23_'T_Hooft_Lecture_1.pdf

Recorded Lecture L1_Gerard_ 't_Hooft_230621_0930.mp4

10:30 Coffee Break

44 Can standard quantum field theories have an ontological origin?

Speaker: Gerard 't Hooft

Lecture Materials QC23_'T_Hooft_Lecture_1.pdf

Recorded Lecture L2_Gerard_ 't_Hooft_230621_1045.mp4

11:45 Lunch Break

45 Doping and Probing the Original Liquid

Heavy ion collisions reproduce droplets of the trillions-of-degrees-hot liquid that filled the microseconds-old universe, called quark-gluon plasma (QGP). Over the past twenty years, data obtained via recreating this primordial fluid have shown that it is the most liquid liquid in the universe, making it the first complex matter to form as well as the source of all protons and neutrons. After a look at what we have learned about the formation and properties of this original liquid from heavy ion collisions, I will focus on the road ahead. I will frame questions that motivate experimental measurements coming soon, including: How does liquid QGP change as it is doped with an excess of quarks over antiquarks? Is there a critical point in the region of the QCD phase diagram as a function of temperature and doping that heavy ion collisions can explore? How does a strongly coupled liquid emerge, given that what you will see if you can probe QGP with high resolution is weakly coupled quarks and gluons? How can we use jets to see the inner workings of QGP and answer this question?

Speaker: Krishna Rajagopal

Lecture Materials QC23_Rajagopal_Lectures_v2.pdf

Recorded Lecture L3_Krishna_Rajagopal_230621_1300.mp4

13:50 Break

46 Doping and Probing the Original Liquid

Heavy ion collisions reproduce droplets of the trillions-of-degrees-hot liquid that filled the microseconds-old universe, called quark-gluon plasma (QGP). Over the past twenty years, data obtained via recreating this primordial fluid have shown that it is the most liquid liquid in the universe, making it the first complex matter to form as well as the source of all protons and neutrons. After a look at what we have learned about the formation and properties of this original liquid from heavy ion collisions, I will focus on the road ahead. I will frame questions that motivate experimental measurements coming soon, including: How does liquid QGP change as it is doped with an excess of quarks over antiquarks? Is there a critical point in the region of the QCD phase diagram as a function of temperature and doping that heavy ion collisions can explore? How does a strongly coupled liquid emerge, given that what you will see if you can probe QGP with high resolution is weakly coupled quarks and gluons? How can we use jets to see the inner workings of QGP and answer this question?

Speaker: Krishna Rajagopal

Lecture Materials QC23_Rajagopal_Lectures_v2.pdf

Recorded Lecture L4_Krishna_Rajagopal_230621_1410.mp4

15:00 Coffee Break

Q&A: Q&A (Gerard ′t Hooft and Krishna Rajagopal)

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

15:30 Pool followed by barbeque dinner

Thursday 22 June

47 Quantum Connections: from Hall Physics to Optics to Black Holes

Time and again, one encounters marvelous unifying physics that links phenomena from the most miniscule to astronomical scales. This lecture set will explore one such direction that brings together fundamentals of quantum optics, quantum Hall physics, and certain aspects of black hole dynamics. We will first establish some of the basics of quantum Hall physics and associated lowest Landau levels, and the behavior of quasiparticles in this realm in the presence of a potential landscape. We will see some deep parallels between these descriptions, and quantum optical concepts, such as coherent states and squeezing. We will then see how such phenomena translate to Hawking radiation and black hole ringdown in the astronomical realm. Finally, we will build on these concepts to explore an intriguing quantum particle that differs from the fermion and boson---the anyon,--which has recently been observed and come into the limelight.

Speaker: Smitha Vishveshwara

Lecture Materials QC23_Smitha_Vishveshwara.pdf

Recorded Lecture L1_Smitha_Vishveshwara_230622_0930.mp4

10:30 Coffee Break

48 Quantum Connections: from Hall Physics to Optics to Black Holes

Time and again, one encounters marvelous unifying physics that links phenomena from the most miniscule to astronomical scales. This lecture set will explore one such direction that brings together fundamentals of quantum optics, quantum Hall physics, and certain aspects of black hole dynamics. We will first establish some of the basics of quantum Hall physics and associated lowest Landau levels, and the behavior of quasiparticles in this realm in the presence of a potential landscape. We will see some deep parallels between these descriptions, and quantum optical concepts, such as coherent states and squeezing. We will then see how such phenomena translate to Hawking radiation and black hole ringdown in the astronomical realm. Finally, we will build on these concepts to explore an intriguing quantum particle that differs from the fermion and boson---the anyon,--which has recently been observed and come into the limelight.

Speaker: Smitha Vishveshwara

Lecture Materials QC23_Smitha_Vishveshwara.pdf

Recorded Lecture L2_Smitha_Vishveshwara_230622_1045.mp4

11:45 Lunch Break

49 Quantum Field Theory on the Lattice

Speaker: Zoltan Fodor

Lecture Materials QC23_Zoltan_Fodor_L3.pdf

Recorded Lecture L3_Zoltan_Fodor_230622_1300.mp4

13:50 Break

50 Quantum Field Theory on the Lattice

Speaker: Zoltan Fodor

Lecture Materials QC23_Zoltan_Fodor_L4.pdf

15:00 Coffee Break

51 Chiral symmetry and the Theta parameter

Speaker: Michael Creutz

Lecture Materials QC23_Creutz_Lecture_1.pdf

Recorded Lecture L5_Michael_Creutz_230622_1530.mp4

16:20 Break

52 Lattice Fermions

Speaker: Michael Creutz

Lecture Materials QC23_Creutz_Lecture_2.pdf

Recorded Lecture L6_Michael_Creutz_230622_1640.mp4

17:30 Break

Q&A: Question/Answer (Smitha Visveshwara – Zoltan Fodor - Michael Creutz)

Question and answer session with the lecturers.

Recorded Lecture Q&A_Prof.Smitha.V_Prof.Zoltan.F_Prof.Michael.C_230622_1745.mp4

18:40 Dinner

Friday 23 June

53 Exploring new scientific frontiers using programmable atom arrays

Speaker: Mikhail Lukin

Recorded Lecture L1_Mikhail_Lukin_230623_0930.mp4

10:30 Coffee Break

54 Exploring new scientific frontiers using programmable atom arrays

Speaker: Mikhail Lukin

Recorded Lecture L2_Mikhail_Lukin_230623-1045.mp4

11:45 Lunch Break

55 QCD beyond perturbation theory

Speaker: Michael Creutz

Lecture Materials QC23_Creutz_Lecture_3.pdf

Recorded Lecture L3_Michael_Creutz_230623_1300.mp4

13:45 Break

56 Real virtuality: Freedom and confinement

The contrast between (asymptotic) freedom and confinement was a source of great unease and some confusion in the early days of QCD. Some people still obsess over it. The degrees of freedom in which the theory is most naturally formulated, and that in a real sense become manifest at high energies or short distances – that is, quarks and gluons - are completely different from the degrees of freedom – that is, hadrons - that appear in the spectrum and the S matrix. How can such different descriptions coexist? In what sense can virtual particles be real physical entities?

I will discuss how similar behavior arises in much simpler models than QCD – specifically, QED in 1 + 1 dimensions – where we can understand how it works in detail, both intuitively and mathematically. Along the way I will give a precise discussion of time-energy uncertainty, which is central to resolving the tension. I will also discuss some recent work using related ideas to suggest new observable phenomena in condensed matter physics.

Following that (not very!) technical part of the presentation I will reminiscence briefly about my own experiences in the early days, and add some brief remarks about the status of QCD today and going forward.

Speaker: Frank Wilczek (Stockholm University)

Lecture Materials QC23_Wilczek_QCD.pdf

Recorded Lecture L4_Frank_Wilczek_230623_1400.mp4

14:45 Break

57 How quantum chromodynamics took us by surprise

Speaker: Gerard ‘tHooft

Lecture Materials QC23_'T_Hooft_QCD.pdf

Recorded Lecture L5_Gerard_‘t_Hooft_230623_1500.mp4

15:45 Break

58 Fifty Years of Quantum Chromodynamics (The Theory of The Strong Nuclear Force)

Speaker: David Gross

Recorded Lecture L6_David_Gross_230623_1600.mp4

59 Closing Ceremony

17:30 Midsummer party with drinks, dinner and disco

Saturday 24 June

04:00 Check-out