You are cordially invited to the SCL seminar of the Center for the Study of Complex Systems, which will be held on Thursday, 20 November 2025 at 14:00 in the library reading room "Dr. Dragan Popović" of the Institute of Physics Belgrade. The talk entitled

Escaping Thermalization: Quantum Simulations of Many-Body Scars

will be given by Ana Hudomal (SCL, Institute of Physics Belgrade). The abstract of the talk:

Understanding thermalization in isolated quantum systems is one of the central challenges in quantum many-body physics. While the eigenstate thermalization hypothesis provides a general framework, an increasing number of exceptions are now known. One such exception is a novel class of systems in which a small number of non-thermal eigenstates coexist with an otherwise ergodic spectrum, representing a form of weak ergodicity breaking [1]. These atypical eigenstates, known as quantum many-body scars (QMBS), can lead to unexpectedly long-lived coherent dynamics. In this talk, I will discuss how QMBS behavior can be realized and explored using a variety of quantum simulators, including Rydberg-atom arrays, as well as Bose-Hubbard [2] and Fermi-Hubbard systems [3]. I will also show how certain perturbations can enhance scarring [4] or give rise to previously unknown non-ergodic regimes [5].

[1] M. Serbyn, D. A Abanin, and Z. Papić, Nat. Phys. 17, 675 (2021).
[2] G.-X. Su, H. Sun, A. Hudomal et al., PRResearch 5, 023010 (2023).
[3] J.-Y. Desaules, A. Hudomal, C. Turner, and Z. Papić, PRL 126, 210601 (2021).
[4] A. Hudomal, J.-Y. Desaules, B. Mukherjee, G.-X. Su, J. Halimeh, and Z. Papić, PRB 106, 104302 (2022).
[5] A. Daniel, A. Hallam, J.-Y. Desaules, A. Hudomal, G.-X. Su, J. Halimeh, and Z. Papić, PRB 107, 235108 (2023).