Work

Braiding quantum circuit based on the 4 π Josephson effect

Year: 2019

Type: article

Abstract: We propose a topological qubit in which braiding and readout are mediated by the $4\ensuremath{\pi}$ Majorana-Josephson effect. The braidonium device consists of three Majorana nanowires that come together to make a trijunction. In order to control the superconducting phase differences at the trijunction, the nanowires are enclosed in a ring made of a conventional superconductor. In order to perform initialization and readout, one of the nanowires is coupled to a fluxonium qubit through a topological Josephson junction. We analyze how flux-based control and readout protocols can be used to demonstrate braiding and qubit operation for realistic materials and circuit parameters.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.99.035307

Authors: John P. T. Stenger, Michael Hatridge, Sergey M. Frolov, David Pekker

Institution: University of Pittsburgh

Language: Latvian

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Office of Naval Research, Army Research Office

Awards: EAGER: BRAIDING: Majorana Bound States in Semiconductor Nanowire Networks, PIRE: Hybrid Materials for Quantum Science and Engineering (HYBRID)