Dephasing of solid-state qubits at optimal points

Preprint

22 December 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0308297

Abstract

Motivated by recent experiments with Josephson-junction circuits, we analyze the influence of various noise sources on the dynamics of two-level systems at optimal operation points where the linear coupling to low-frequency fluctuations is suppressed. We study the decoherence due to nonlinear (quadratic) coupling, focusing on the experimentally relevant 1/f and Ohmic noise power spectra. For 1/f noise strong higher-order effects influence the evolution.

Keywords

POINTS MOTIVATED
OPTIMAL POINTS
LEVEL SYSTEMS
STATE QUBITS
1/F NOISE
EVOLUTION
DEPHASING
NOISE

All Related Versions

Version 1, 2003-08-14, ArXiv
Version 2, 2003-12-22, ArXiv
Published version: Physical Review Letters, 92 (17), 178301.

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