Quantum Many-Body Scar States in Two-Dimensional Rydberg Atom Arrays
- URL: http://arxiv.org/abs/2003.04516v2
- Date: Wed, 24 Jun 2020 03:42:06 GMT
- Title: Quantum Many-Body Scar States in Two-Dimensional Rydberg Atom Arrays
- Authors: Cheng-Ju Lin, Vladimir Calvera, Timothy H. Hsieh
- Abstract summary: We find exponentially many exact quantum many-body scar states in a two-dimensional PXP model.
This is an effective model for a two-dimensional Rydberg atom array in the nearest-neighbor blockade regime.
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- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We find exponentially many exact quantum many-body scar states in a
two-dimensional PXP model -- an effective model for a two-dimensional Rydberg
atom array in the nearest-neighbor blockade regime. Such scar states are
remarkably simple valence bond solids despite being at effectively infinite
temperature, and thus strongly violate the eigenstate thermalization
hypothesis. Given a particular boundary condition, such eigenstates have
integer-valued energies. Moreover, certain charge-density-wave initial states
give rise to strong oscillations in the Rydberg excitation density after a
quantum quench and tower-like structures in their overlaps with eigenstates.
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