The initial decoherence of the mesoscopic Josephson junction flux qubit

doi:10.1088/1674-1056/19/5/057301

中国物理B ›› 2010, Vol. 19 ›› Issue (5): 57301-057301.doi: 10.1088/1674-1056/19/5/057301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

The initial decoherence of the mesoscopic Josephson junction flux qubit

苏杰, 王继锁, 张晓燕, 梁宝龙

School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China

收稿日期:2009-04-07 修回日期:2009-08-10 出版日期:2010-05-15 发布日期:2010-05-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.~10574060) and the Natural Science Foundation of Shandong Province of China (Grant No.~Y2008R23).

The initial decoherence of the mesoscopic Josephson junction flux qubit

Su Jie(苏杰), Wang Ji-Suo(王继锁)^†, Zhang Xiao-Yan(张晓燕), and Liang Bao-Long(梁宝龙)

School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China

Received:2009-04-07 Revised:2009-08-10 Online:2010-05-15 Published:2010-05-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.~10574060) and the Natural Science Foundation of Shandong Province of China (Grant No.~Y2008R23).

摘要/Abstract

摘要： For a mesoscopic radio frequency superconducting quantum interference device (rfSQUID), at a degeneracy point, the system reduces to a quantum two-state system which can be used as a flux qubit. When the noise environment is equivalent to a harmonic oscillators bath, by virtue of an operator-norm measure for the short time decoherence, this paper investigates the initial decoherence of the flux qubit operating in the ohmic noise environment and illustrates its property by means of the numerical evaluation.

Abstract: For a mesoscopic radio frequency superconducting quantum interference device (rfSQUID), at a degeneracy point, the system reduces to a quantum two-state system which can be used as a flux qubit. When the noise environment is equivalent to a harmonic oscillators bath, by virtue of an operator-norm measure for the short time decoherence, this paper investigates the initial decoherence of the flux qubit operating in the ohmic noise environment and illustrates its property by means of the numerical evaluation.

Key words: mesoscopic rfSQUID, flux qubit, short-time decoherence

中图分类号: (Superconducting quantum interference devices (SQUIDs))

85.25.Dq

03.67.Lx (Quantum computation architectures and implementations) 85.25.Cp (Josephson devices)

苏杰, 王继锁, 张晓燕, 梁宝龙. The initial decoherence of the mesoscopic Josephson junction flux qubit[J]. 中国物理B, 2010, 19(5): 57301-057301.

Su Jie(苏杰), Wang Ji-Suo(王继锁), Zhang Xiao-Yan(张晓燕), and Liang Bao-Long(梁宝龙). The initial decoherence of the mesoscopic Josephson junction flux qubit[J]. Chin. Phys. B, 2010, 19(5): 57301-057301.

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The initial decoherence of the mesoscopic Josephson junction flux qubit

The initial decoherence of the mesoscopic Josephson junction flux qubit

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