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Title: Sitewise manipulations and Mott insulator-superfluid transition of interacting photons using superconducting circuit simulators

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [1]
  1. Univ. of California, Merced, CA (United States)
  2. Stanford Univ., CA (United States). Dept. of Applied Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)

We report that the Bose Hubbard model (BHM) of interacting bosons in a lattice has been a paradigm in many-body physics, and it exhibits a Mott insulator (MI)-superfluid (SF) transition at integer filling. Here a quantum simulator of the BHM using a superconducting circuit is proposed. Specifically, a superconducting transmission line resonator supporting microwave photons is coupled to a charge qubit to form one site of the BHM, and adjacent sites are connected by a tunable coupler. To obtain a mapping from the superconducting circuit to the BHM, we focus on the dispersive regime where the excitations remain photonlike. Standard perturbation theory is implemented to locate the parameter range where the MI-SF transition may be simulated. This simulator allows single-site manipulations and we illustrate this feature by considering two scenarios where a single-site manipulation can drive a MI-SF transition. The transition can be analyzed by mean-field analyses, and the exact diagonalization was implemented to provide accurate results. The variance of the photon density and the fidelity metric clearly show signatures of the transition. Lastly, experimental realizations and other possible applications of this simulator are also discussed.

Research Organization:
Univ. of California, Merced, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1254005
Alternate ID(s):
OSTI ID: 1180653
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 5; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (5)

Symmetry between repulsive and attractive interactions in driven-dissipative Bose-Hubbard systems journal February 2018
Challenges and constraints of dynamically emerged source and sink in atomtronic circuits: From closed-system to open-system approaches journal November 2016
Resonant persistent currents for ultracold bosons on a lattice ring journal December 2017
Dispersion-suppressed topological Thouless pumping journal August 2019
Symmetry between repulsive and attractive interactions in driven-dissipative Bose-Hubbard systems text January 2017

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