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Title: Quantum computing universal thermalization dynamics in a (2 + 1)D Lattice Gauge Theory

Journal Article · · Nature Communications
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [2]
  1. University of New Mexico, Albuquerque, NM (United States); University of Washington, Seattle, WA (United States)
  2. Duke University, Durham, NC (United States); University of Maryland, College Park, MD (United States)
  3. Duke University, Durham, NC (United States); Cornell University, Ithaca, NY (United States)
  4. University of Maryland, College Park, MD (United States)

Simulating non-equilibrium phenomena in strongly-interacting quantum many-body systems, including thermalization, is a promising application of near-term and future quantum computation. By performing experiments on a digital quantum computer consisting of fully-connected optically-controlled trapped ions, we study the role of entanglement in the thermalization dynamics of a Z2 lattice gauge theory in 2+1 spacetime dimensions. Using randomized-measurement protocols, we efficiently learn a classical approximation of non-equilibrium states that yields the gap-ratio distribution and the spectral form factor of the entanglement Hamiltonian. These observables exhibit universal early-time signals for quantum chaos, a prerequisite for thermalization. Our work, therefore, establishes quantum computers as robust tools for studying universal features of thermalization in complex many-body systems, including in gauge theories.

Research Organization:
Univ. of Washington, Seattle, WA (United States); University of Maryland, College Park, MD (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0020271; SC0020970
OSTI ID:
2571474
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 16; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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