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A superconducting quantum simulator based on a photonic-bandgap metamaterial

Journal Article · · Science
 [1];  [2];  [3];  [3];  [4]
  1. Thomas J. Watson, Sr., Laboratory of Applied Physics and Kavli Nanoscience Institute, California Institute of Technology, Pasadena, CA 91125, USA.; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, CA 91125, USA.; OSTI
  2. Thomas J. Watson, Sr., Laboratory of Applied Physics and Kavli Nanoscience Institute, California Institute of Technology, Pasadena, CA 91125, USA.; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, CA 91125, USA.
  3. Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  4. Thomas J. Watson, Sr., Laboratory of Applied Physics and Kavli Nanoscience Institute, California Institute of Technology, Pasadena, CA 91125, USA.; Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, CA 91125, USA.; AWS Center for Quantum Computing, Pasadena, CA 91125, USA.

Synthesizing many-body quantum systems with various ranges of interactions facilitates the study of quantum chaotic dynamics. Such extended interaction range can be enabled by using nonlocal degrees of freedom such as photonic modes in an otherwise locally connected structure. Here, we present a superconducting quantum simulator in which qubits are connected through an extensible photonic-bandgap metamaterial, thus realizing a one-dimensional Bose-Hubbard model with tunable hopping range and on-site interaction. Using individual site control and readout, we characterize the statistics of measurement outcomes from many-body quench dynamics, which enables in situ Hamiltonian learning. Further, the outcome statistics reveal the effect of increased hopping range, showing the predicted crossover from integrability to ergodicity. Our work enables the study of emergent randomness from chaotic many-body evolution and, more broadly, expands the accessible Hamiltonians for quantum simulation using superconducting circuits.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
SC0020152
OSTI ID:
2421453
Journal Information:
Science, Journal Name: Science Journal Issue: 6629 Vol. 379; ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English

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