Loops and strings in a superconducting lattice gauge simulator

Brennen, G. K., Pupillo, G., Rico, E., Stace, T. M. and Vodola, D. (2016) Loops and strings in a superconducting lattice gauge simulator. Physical Review Letters, 117 24: . doi:10.1103/PhysRevLett.117.240504

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Author Brennen, G. K.
Pupillo, G.
Rico, E.
Stace, T. M.
Vodola, D.
Title Loops and strings in a superconducting lattice gauge simulator
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 1079-7114
0031-9007
Publication date 2016-12-07
Year available 2016
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.117.240504
Open Access Status File (Publisher version)
Volume 117
Issue 24
Total pages 7
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2017
Language eng
Formatted abstract
We propose an architecture for an analog quantum simulator of electromagnetism in 2+1 dimensions, based on an array of superconducting fluxonium devices. The encoding is in the integer (spin-1) representation of the quantum link model formulation of compact U(1) lattice gauge theory. We show how to engineer Gauss' law via an ancilla mediated gadget construction, and how to tune between the strongly coupled and intermediately coupled regimes. The witnesses to the existence of the predicted confining phase of the model are provided by nonlocal order parameters from Wilson loops and disorder parameters from 't Hooft strings. We show how to construct such operators in this model and how to measure them nondestructively via dispersive coupling of the fluxonium islands to a microwave cavity mode. Numerical evidence is found for the existence of the confined phase in the ground state of the simulation Hamiltonian on a ladder geometry.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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