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Description
Quantum many-body scars (QMBS) represent a subtle form of ergodicity breaking that is commonly attributed to the existence of anomalous eigenstates. Due to their delicate underlying algebraic structure, the common expectation is that (i) QMBS cannot influence the system's long-time behavior and (ii) they cannot survive generic perturbations. In this presentation, I argue that QMBS can emerge as a stable non-equilibrium phase in non-Hermitian dynamics, which is similar to the entanglement transition induced by the non-Hermitian skin effect. Specifically, I analyze a simple SU(N) spin model supporting QMBS, and show that the system undergoes a sharp first-order-like dynamical phase transition separating the thermal phase and a "scar-dominating" phase as a non-Hermitian control parameter is varied.
Reference: arxiv:2507.22583
Organised by
Laboratory for Theoretical and Computational Physics
Host: Dr. Markus Müller
