Charge-Phase Qubit in Phase Regime

Preprint

10 November 2003

preprint
Published by arXiv in arXiv

Abstract

A superconducting qubit implementation is proposed that takes the advantage of both charge and phase degrees of freedom. Superpositions of flux states in a superconducting loop with three Josephson junctions form the states of the qubit. The charge degree of freedom is used to readout and couple the qubits. Cancellation of the first order coupling to the environment, at the working point of the qubit, protects it from the decoherence due to charge and flux fluctuations.

Keywords

SUPERCONDUCTING QUBIT
QUBIT IMPLEMENTATION
DEGREE OF FREEDOM
DECOHERENCE DUE
CHARGE PHASE
PHASE REGIME
PHASE QUBIT

All Related Versions

Version 1, 2003-11-10, ArXiv
Version 2, 2003-12-08, ArXiv
Version 3, 2004-10-26, ArXiv
Published version: Physical Review B, 71 (2), 024504.

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