Charge Echo in a Cooper-Pair Box

Nakamura, Y. and Pashkin, Yuri and Yamamoto, T. and Tsai, Jaw-Shen (2002) Charge Echo in a Cooper-Pair Box. Physical review letters, 88 (4). ISSN 0031-9007

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Abstract

A spin-echo-type technique is applied to an artificial two-level system that utilizes a charge degree of freedom in a small superconducting electrode. Gate-voltage pulses are used to produce the necessary pulse sequence in order to eliminate the inhomogeneity effect in the time-ensemble measurement and to obtain refocused echo signals. Comparison of the decay time of the observed echo signal with an estimated decoherence time suggests that low-frequency energy-level fluctuations due to the 1 / f charge noise dominate the dephasing in the system.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
84747
Deposited By:
Deposited On:
20 Feb 2017 09:48
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Dec 2020 04:26