Speaker
Description
The original PXP chain that opened experimentally the field of quantum many-body scars continues to surprise us. I will first describe discovery [1] of exact volume-entangled eigenstates in this and many related models (including in higher dimensions). I will then describe finding [2] of several new exact scars with finite bond dimension in the PXP chain, including some that provide an excellent description of so-called Z2 scars observed in exact diagonalization and the associated long-lived revivals in quenches from the Z2 CDW state. I will speculate on the possibility that the PXP chain harbors yet more exact scars of increasing complexity that may be progressively more difficult to find.
[1] "Volume-entangled exact eigenstates in the PXP and related models in any dimension," A. N. Ivanov and O. I. Motrunich, Phys. Rev. Lett. 134, 050403 (2025).
[2] "Many exact area-law scar eigenstates in the nonintegrable PXP and related models," A. N. Ivanov and O. I. Motrunich, arXiv:2503.16327
