Quantum noise in the Josephson charge qubit

Preprint

9 November 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0411216

Abstract

We study decoherence of the Josephson charge qubit by measuring energy relaxation and dephasing with help of the single-shot readout. We found that the dominant energy relaxation process is a spontaneous emission induced by quantum noise coupled to the charge degree of freedom. Spectral density of the noise at high frequencies is roughly proportional to the qubit excitation energy.

Keywords

JOSEPHSON CHARGE QUBIT
SPONTANEOUS EMISSION
DEGREE OF FREEDOM
QUANTUM NOISE
NOISE COUPLED
QUBIT

All Related Versions

Version 1, 2004-11-09, ArXiv
Published version: Physical Review Letters, 93 (26), 267007.

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