Work

Doubly nonlinear superconducting qubit

Year: 2019

Type: article

Abstract: We describe a superconducting circuit consisting of a Josephson junction in parallel with a quantum phase slip wire, which implements a Hamiltonian that is periodic in both charge and flux. This Hamiltonian is exactly diagonalizable in a double-Bloch band, and the eigenstates are shown to be code states of the Gottesman-Kitaev-Preskill quantum error correcting code. The eigenspectrum has several critical points, where the linear sensitivity to external charge and flux noise vanishes. The states at these critical points thus hold promise as qubit states that are insensitive to common external noise sources.

Source: Physical Review A

DOI: 10.1103/physreva.100.062321

Authors: Dat Thanh Le, Arne Grimsmo, Clemens Müller, T. M. Stace

Institutions: The University of Queensland, Thang Long University, ARC Centre of Excellence for Engineered Quantum Systems, The University of Sydney, IBM Research - Zurich

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Australian Research Council

Awards: Next generation solid state qubits, ARC Centre of Excellence for Engineered Quantum Systems