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Title: Fluxon-based quantum simulation in circuit QED

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4]
  1. Princeton Univ., NJ (United States); Univ. de Sherbrooke (Canada); DOE/OSTI
  2. Princeton Univ., NJ (United States)
  3. Karlsruhe Inst. of Technology (Germany); National Univ. of Science and Technology MISIS, Moscow (Russia)
  4. Karlsruhe Inst. of Technology (Germany); Karlsruhe Inst. of Technology, Leopoldshafen (Germany)

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 one-dimensional 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 one-fluxon subspace, which hosts a symmetry-protected topological phase with fractionally charged bound states at the edges. Furthermore, this pair of localized edge states could be used to implement a superconducting qubit increasingly decoupled from decoherence mechanisms.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0016011
OSTI ID:
1612377
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 17 Vol. 98; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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