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Title: Localization and Criticality in Antiblockaded Two-Dimensional Rydberg Atom Arrays

Journal Article · · Physical Review Letters
 [1]; ORCiD logo [2];  [2];  [3]; ORCiD logo [2]
  1. Univ. of Maryland, College Park, MD (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); OSTI
  2. Univ. of Maryland, College Park, MD (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  3. Iowa State Univ., Ames, IA (United States)

Controllable Rydberg atom arrays have provided new insights into fundamental properties of quantum matter both in and out of equilibrium. In this work, we study the effect of experimentally relevant positional disorder on Rydberg atoms trapped in a 2D square lattice under antiblockade (facilitation) conditions. We show that the facilitation conditions lead the connectivity graph of a particular subspace of the full Hilbert space to form a 2D Lieb lattice, which features a singular flat band. Remarkably, we find three distinct regimes as the disorder strength is varied: a critical regime, a delocalized but nonergodic regime, and a regime with a disorder-induced flat band. The critical regime’s existence depends crucially upon the singular flat band in our model, and is absent in any 1D array or ladder system. We propose to use quench dynamics to probe the three different regimes experimentally.

Research Organization:
Univ. of Maryland, College Park, MD (United States); Duke Univ., Durham, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC); US Office of Naval Research (ONR); US Air Force Office of Scientific Research (AFOSR)
Grant/Contract Number:
SC0019040; SC0019449; SC0020312
OSTI ID:
1980249
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 128; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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