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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster – Ultracold Matter (joint session Q/A)

Q 42.25: Poster

Mittwoch, 4. März 2026, 17:00–19:00, Philo 2. OG

Stabilizing a continuous family of quantum many-body scarred states in the PXP model using periodic driving — •Stefan Malijević and Ana Hudomal — Institute of Physics Belgrade, University of Belgrade, Serbia

Experiments on Rydberg atom arrays have revealed a novel class of quantum systems in which a small subset of atypical eigenstates, known as quantum many-body scars, gives rise to persistent revivals and suppresses thermalization for specific initial states [1]. In the strongly interacting regime, this behavior is effectively captured by the PXP model. Recent experiments have shown that periodic driving, when tuned to optimal parameters, can further enhance scar-induced revivals [2]. However, previous studies of the driven PXP model have primarily focused on a few simple initial product states [3]. In this work, we consider a recently discovered continuous family of scarred states in the PXP model with chemical potential, which includes highly entangled states near the quantum phase transition [4]. Using numerical simulations of the periodically driven model, we analyze the response of these states to different driving protocols and identify regimes in which periodic modulation most effectively stabilizes the scarred dynamics.

[1] M. Serbyn et al., Nat. Phys. 17, 675 (2021).

[2] D. Bluvstein et al., Science 371, 1355 (2021).

[3] A. Hudomal et al., PRB 106, 104302 (2022).

[4] A. Daniel et al., PRB 107, 235108 (2023).

Keywords: Quantum many-body scars; Eigenstate thermalization hypothesis; Rydberg atom arrays; Floquet systems; Exact diagonalization