Efficient Read-out of Flux Qubits at Flux Degeneracy

Author: Käck Andreas   Wendin Göran   Wilhelm Frank  

Publisher: Springer Publishing Company

ISSN: 1570-0755

Source: Quantum Information Processing, Vol.5, Iss.6, 2006-12, pp. : 563-575

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Abstract

We discuss a novel method to read out a superconducting flux qubit at the flux degeneracy point, using a charge measurement through a single charge transistor SCT. The interaction is based on the Aharonov-Casher geometric phase. The read-out cycle indicates one of the states by a fluorescence-like cycle. We discuss how to efficiently implement this scheme with the SCT in the RF mode.