Fluxon-Based Quantum Simulation in Circuit QED
Abstract
Long-lived fluxon excitations can be trapped inside a superinductor ring, which is divided into an array of loops by a periodic sequence of Josephson junctions in the quantum regime, thereby allowing fluxons to tunnel between neighboring sites. By tuning the Josephson couplings, and implicitly the fluxon tunneling probability amplitudes, a wide class of 1D tight-binding lattice models may be implemented and populated with a stable number of fluxons. We illustrate the use of this quantum simulation platform by discussing the Su-Schrieffer-Heeger model in the 1-fluxon subspace, which hosts a symmetry protected topological phase with fractionally charged bound states at the edges. This pair of localized edge states could be used to implement a superconducting qubit increasingly decoupled from decoherence mechanisms.
Cite
@article{arxiv.1712.08630,
title = {Fluxon-Based Quantum Simulation in Circuit QED},
author = {Alexandru Petrescu and Hakan E. Türeci and Alexey V. Ustinov and Ioan M. Pop},
journal= {arXiv preprint arXiv:1712.08630},
year = {2018}
}
Comments
13 pages, 7 figures