Nov 21 – 23, 2022
Albano Building 3
Europe/Stockholm timezone


Long-range interactions are present in various problems, spreading from the dipolar excitations in solid state systems to Rydberg atoms in optical lattices, trapped ions or in the models of localization of light or sound.

Until very recently, the Anderson localization in such systems present even in low dimensions was believed to be straightforwardly understood by the standard methods, such as resonance counting and the locator expansion. On the other hand, the so-called non-ergodic delocalized (multifractal) states were believed to be an interesting, but marginally present only precisely at the Anderson transition point.

Recently, both these points have been challenged: both the entire phases of non-ergodic delocalized states and the Anderson localization beyond the convergence of the locator expansion have been found in long-range models. Therefore the understanding of these counterintuitive effects of correlations on Anderson localization as well as their interplay with Bethe-ansatz integrability, anisotropy, or time-reversal symmetry breaking are in the focus of the workshop, as both these directions are poorly developed and attract an increasing number of researchers to the field.

The main aim of the workshop is to find connections between a universal random-matrix description (including ergodicity-breaking phenomena and localization problems in many-body systems and the ones on random graphs), on one hand, and the model computer simulations and real experiments in many-body systems, on the other.

Zoom coordinates
Meeting ID: 697 8163 8547


Mon, Nov 21 Tue, Nov 22 Wed, Nov 23 
  09:00 – 10:30:

09:00 - 09:30
09:30 - 10:00
10:00 - 10:30
Session 3: MBL + RRG
Chair: M. Tarzia
Sthitadhi Roy (online)
Gabriel Lemarie (online)
Alexander S. Gorsky
09:00 – 10:30:

09:00 - 09:45
09:45 - 10:30
Session 7: chaos
Chair: Y. Bar Lev
Valentina Ros
Eugene Bogomolny
  10:30 – 11:00Coffee break10:30 – 11:00Coffee break
11:00 - 12:15
Hörsal 3, Hus 2

12:15 - 13:45
Boris Alsthuler
Colloquium on
"Many-body localization"
Zoom link
Registration + Lunch
11:00 – 12:30:

11:00 - 11:45
11:45 - 12:30
Session 4: RRG
Chair: J. Chalker
Martin Zirnbauer
Antonello Scardicchio
11:00 – 12:45:

11:00 - 11:45
11:45 - 12:15
12:15 - 12:45
Session 8: integrability
Chair: A. Scardicchio
Ward L. Vleeshouwers
Jing Yang 
Soumi Ghosh (online)
13:45 – 14:00Opening12:30 – 14:00Lunch + discussions12:45 – 13:00Closing remarks
14:00 – 15:30:

14:00 - 14:45
14:45 - 15:30
Session 1: ETH/MBL
Chair: M. Zirnbauer
John Chalker
Matthias Weidemüller
14:00 – 15:30:

14:00 - 14:45
14:45 - 15:30
Session 5: RRG
Chair: V. Ros
Manuel Pino
Marco Tarzia
15:30 – 16:00Coffee break15:30 – 16:00Coffee break  
16:00 – 17:30:

16:00 - 16:45
16:45 - 17:30
Session 2: long-range MBL
Chair: L. Santos
Alexander L. Burin
Yevgeny Bar Lev
16:00 – 17:30:

16:00 -  16:45
16:45 - 17:30
Session 6: dipolar systems
Chair: M. Weidemüller
Robin Kaiser (online)
Luis Santos
17:30 – 19:00Posters: flash talks17:30 – 18:30discussion + posters  
 Reception (snacks)20:00 – 22:30Conference dinner  

The abstracts of the contributions can be seen via the link.
The list of all participants with their participation format can be seen in the Participant List section.

The workshop dinner will take place on the 22nd of November at 20:00, at the restaurant Knut bar (Regeringsgatan 77).

The video proceedings of the workshop have been published in the educational platform Enabla.
The links under the speakers' titles provide the access to the individual Enabla video recording.

Invited speakers and their talks

Yevgeny Bar Lev
(Ben Gurion, IS)
Transport in long-range interacting systems
(not recorded)
Eugene Bogomolny
(LPTMS, Orsay, FR)
Statistical properties of quantum barrier billiards
Alexander L. Burin
(Tulane, US)
Many body localization in the presence of the long-range power law interaction
John T. Chalker
(Oxford, UK)
The statistical properties of eigenstates in chaotic many-body quantum systems
Robin Kaiser (online)
Resonant dipole-dipole interactions: Dicke subradiance and Anderson localisation
Manuel Pino
(Uni Salamanca, ES)
Scaling up the Anderson transition in random-regular graphs
Valentina Ros
(LPTMS, Orsay, FR)
Fluctuation-driven transitions in insulators: Intermittent metallicity and path chaos
Luis Santos
(Uni Hannover, GE)
Dynamics and localization in polar lattice gases
Antonello Scardicchio
Universality in the Anderson transition on random graphs
Marco Tarzia
(LPTMC, Sorbonne, FR)
Loop expansion around the Bethe approximation for the Anderson model
Ward L. Vleeshouwers
(Uni Amsterdam, NE)
Unitary matrix integrals and applications to long range random walk models
(not recorded)
Matthias Weidemüller
(Uni Heidelberg, GE)
Does an isolated quantum spin system thermalize?
Martin Zirnbauer
(Uni Cologne, GE)
Field theory of Anderson transitions at strong coupling: scenario of spontaneous symmetry breaking

Contributed speakers and their talks

Soumi Ghosh (online)
Spectral properties of disordered interacting non-Hermitian systems 
Alexander S. Gorsky
New findings for localization on RRG
Gabriel Lemarie (online)
(MajuLab, SG/FR)
Anderson transition in random graphs: Kosterlitz-Thouless type flow and MBL transition
Sthitadhi Roy (online)
Hilbert-space correlations and bipartite entanglement
Jing Yang
(Uni Luxembourg, LUX)
One-dimensional Integrable Systems from the Jastrow Wave Functions

Posters with titles (mostly online)

1. David Aceituno Chavez on site 
Slow growth of number entropy in the the Many-Body Localized phase from the l-bit picture
2. Wouter Buijsman
(Ben Gurion, IS)
Circular Rosenzweig-Porter random matrix ensemble
3. Adway Kumar Das
(IISER, Kolkata, IN)
Non-ergodicity in the beta ensemble
4. Roopayan Ghosh
Resonance induced growth of number entropy in strongly disordered systems
5. Asmi Haldar
(MPIPKS, Dresden, GE)
Heating Suppression in Clean Interacting Floquet Systems
6. Anton Kutlin on site 
Anatomy of the eigenstates distribution: a quest for a genuine multifractality
7. Youcef Mohdeb on site
(Jacobs Uni, Bremen, GE)
Logarithmic Growth of Entanglement Entropy in Disordered Spin Chains with Tunable Range Interactions
8. Dillip Kumar Nandy,
(IBS - PCS, Kor)
Probing MBL using adiabatic gauge potential
9. Lukas Pausch
(Albert-Ludwigs-Uni, GE)
Chaos in the Bose-Hubbard model versus Gaussian orthogonal and embedded random matrix ensembles
10. Madhumita Sarkar
(Jožef Stefan Inst., Ljubljana, SI)
Multifractality in periodically driven Aubry–André model

The poster session (not flash talks) will take place in In order to access each poster individually, one can press on the corresponding number in the above list.

Application/Registration (closed; open only for online participation)

Please register for the participation (online or in person) and provide the information about your contribution and accommodation requests via the link.

Accommodation information

Accommodation for invited speakers will be organized and paid by Nordita in BizApartments in Stockholm area. The contributed speakers should pay accommodation themselves. Nordita can provide the BizApartments for the reduced rate by the request (please see the application form).

Travel support

Due to the limited budget, we do not plan to have any travel support for participants.

Sponsored by:


Albano Building 3
Conference center, room 4205
Albanovägen 29
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