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Quantum many-body scars from Einstein-Podolsky-Rosen states in bilayer systems

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [5];  [2]
  1. Iowa State Univ., Ames, IA (United States); OSTI
  2. Texas A & M Univ., College Station, TX (United States)
  3. Univ. of Maryland, College Park, MD (United States). Joint Quantum Institute and Joint Center for Quantum Information and Computer Science; Peking Univ., Beijing (China)
  4. Univ. of Maryland, College Park, MD (United States). Joint Quantum Institute and Joint Center for Quantum Information and Computer Science
  5. Iowa State Univ., Ames, IA (United States); Ames Laboratory (AMES), Ames, IA (United States)
Quantum many-body scar states are special eigenstates of nonintegrable models with distinctive entanglement features that give rise to infinitely long-lived coherent dynamics under quantum quenches from certain initial states. Here, we elaborate on a construction of quantum many-body scar states in which they emerge from Einstein-Podolsky-Rosen states in systems with two layers, wherein the two layers are maximally entangled. We apply this construction to spin systems as well as systems of itinerant fermions and bosons and demonstrate how symmetries can be harnessed to enhance its versatility. We show that several well-known examples of quantum many-body scars, including the tower of states in the spin-1 XY model and the η-pairing states in the Fermi-Hubbard model, can be understood within this formalism. We also demonstrate how an infinite tower of many-body scar states can emerge in bilayer Bose-Hubbard models with charge conservation.
Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
SC0019040; SC0020312
OSTI ID:
2420919
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 20 Vol. 106; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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