Decoherence in a superconducting quantum bit circuit

Preprint

24 August 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0508588

Abstract

Decoherence in quantum bit circuits is presently a major limitation to their use for quantum computing purposes. We present experiments, inspired from NMR, that characterise decoherence in a particular superconducting quantum bit circuit, the quantronium. We introduce a general framework for the analysis of decoherence, based on the spectral densities of the noise sources coupled to the qubit. Analysis of our measurements within this framework indicates a simple model for the noise sources acting on the qubit. We discuss various methods to fight decoherence.

Keywords

SUPERCONDUCTING QUANTUM BIT
FRAMEWORK FOR THE ANALYSIS
CIRCUIT DECOHERENCE
QUANTUM BIT CIRCUIT
BIT CIRCUIT
QUBIT

All Related Versions

Version 1, 2005-08-24, ArXiv
Published version: Physical Review B, 72 (13).

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