RQI Circuit Stockholm

Session

Session 1

17 Nov 2023, 13:05

Albano 3: 6228 - Mega (22 seats) (Albano Building 3)

Conveners

Session 1

• Germain Tobar (Stockholm University)

3. Background Independence and Quantum Causal Structure

Fabio Costa (Stockholm University, Nordita)

17/11/2023, 13:05

One of the key ways in which quantum mechanics differs from general relativity is that it requires a fixed background reference frame for spacetime. In fact, this appears to be one of the main conceptual obstacles to uniting the two theories. Additionally, a combination of the two theories is expected to yield `indefinite' causal structures. In this paper, we present a background-independent...

4. Relational Quantum Relativity

Jan Głowacki (CFT PAS, ICTQT)

17/11/2023, 13:30

Maybe instead of quantizing relativistic field theories, which we argue to be problematic both conceptually and formally, we could try to relativize the quantum mechanical framework itself? I wish to advertise a research program constituting a direction in the general landscape of the so-called Quantum Reference Frames. The broad idea is to treat reference frames as both physical systems and...

5. Non-Perturbative and Numerical Treatment of Detectors and Fields in Relativistic Scenarios

Robert Jonsson (Stockholm University, Nordita)

17/11/2023, 13:55

The mathematical treatment of the interaction between matter and light, especially in relativistic scenarios, is challenging. Even fundamental models, such as the Unruh-DeWitt detector model, present significant obstacles when seeking to treat exactly detector responses, communication scenarios, or entanglement extraction processes.

In many cases, perturbation theory allows for analytic...

6. Localisation problem in Unruh-DeWitt detectors with quantised centre of mass

Evan Gale (University of Queensland)

17/11/2023, 14:20

The topic of particle localisation, namely how one defines a position operator or centre of mass in relativistic quantum mechanics, has been a longstanding question in the foundations of quantum mechanics since the mid-20th century. However, despite the length and breadth of study, the localisation problem is still not well understood.

I examine the implications of particle localisation in...