Measurements of Decoherence Times in a Josephson Charge Qubit Using Fast Pulses

Duty, T., Bladh, K., Gunnarsson, D. and Delsing, P. (2004) Measurements of Decoherence Times in a Josephson Charge Qubit Using Fast Pulses. Journal of Low Temperature Physics, 136 5-6: 453-463. doi:10.1023/B:JOLT.0000041277.03323.1d


Author Duty, T.
Bladh, K.
Gunnarsson, D.
Delsing, P.
Title Measurements of Decoherence Times in a Josephson Charge Qubit Using Fast Pulses
Journal name Journal of Low Temperature Physics   Check publisher's open access policy
ISSN 0022-2291
1573-7357
Publication date 2004-09
Sub-type Article (original research)
DOI 10.1023/B:JOLT.0000041277.03323.1d
Volume 136
Issue 5-6
Start page 453
End page 463
Total pages 11
Editor XMeyer, H.
Paalanen, M.
Sullivan, N.
Place of publication New York
Publisher Plenum Press
Language eng
Subject 240000 Physical Sciences
Abstract We study decoherence of a Josephson charge qubit using fast pulses to perform qubit rotations. The gate charge dependence of the decoherence rate indicates that the low frequency fluctuations affecting the qubit are from charges distributed with a 1/f-type spectrum. Assuming the form S-q(omega) = alpha/omega, we find rootalpha = 4 x 10(-3)e, which is slightly higher than the value found from very low frequency noise measurements.
Keyword Physics, Applied
Physics, Condensed Matter
Single-electron Transistor
Macroscopic Quantum States
Tunneling Devices
Oscillations
Relaxation
Noise
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
 
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Created: Mon, 04 Aug 2008, 10:18:51 EST by Thelma Whitbourne on behalf of School of Mathematics & Physics