超欧姆型热库环境下互感效应对磁通量子比特退相干的影响

J4 ›› 2012, Vol. 29 ›› Issue (6): 714-722.

超欧姆型热库环境下互感效应对磁通量子比特退相干的影响

邹雄¹ 冯斌斌¹ 嵇英华^1，2

1 江西师范大学物理与通信电子学院，江西南昌 330022；
2 江西省光电子与通信重点实验室，江西南昌 330022

收稿日期:2011-11-10 修回日期:2011-12-10 出版日期:2012-11-28 发布日期:2014-03-20
通讯作者: 嵇英华(1960-)江西临川人，教授，主要研究方向为量子信息。 E-mail:jxsdjyh@yahoo.com.cn
作者简介:邹雄 (1986-)江西宜黄人，研究生，主要从事量子计算与量子信息的研究。E-mail: sean1986@163.com
基金资助:
国家自然科学基金(10864002)资助项目

Mutual inductance’s influence to the flux qubits decoherence under super-Ohm thermal reservoir environment

ZOU Xiong¹ ，FENG Bin-bin¹ ，JI Ying-hua^1，2

1 College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China ;
2 Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, China

Received:2011-11-10 Revised:2011-12-10 Published:2012-11-28 Online:2014-03-20

摘要/Abstract

摘要：

在二能级近似下运用Bloch-Redfield方程,研究了超导量子电路中的磁通量子比特退相干在超欧姆热库环境下受互感效应的影响。研究结果表明：（1）在超欧姆热库环境下，提高环境指标系数有利于延长超导磁通量子比特的退相干时间；（2）构建超欧姆型热库环境可以改进固态量子比特的退相干；（3）电感元件间的互感耦合对量子电路系统退相干的影响是比较复杂的，调控好电感元件间的互感耦合有利于提高退相干时间。

关键词: 量子光学, 退相干, 磁通量子比特, 超欧姆型热库

Abstract:

Under two-level approximation, made use of the Bloch-Redfield function, studied the flux quantum qubit decoherence in the superconducting qubit circuit affected by the mutual inductance’s influence under the super-Ohm thermal reservoir environment. The results show: (1)Under the super-Ohm thermal reservoir environment, improve the environmental indicators coefficient can help to extend the decoherence time of the superconducting flux qubits , thus improving the magnetic flux qubits decoherence. (2)Building super-Ohm thermal reservoir environment can improve the solid-state qubit decoherence. (3) The effects of the mutual inductance coupling between the inductive elements to the quantum circuit system’s decoherence are more complicate, good regulation of the mutual inductance between the inductive coupling elements can help to improve the decoherence time.

Key words: quantum optics, decoherence, flux quantum qubit, super-Ohm thermal reservoir

中图分类号:

O431

邹雄冯斌斌嵇英华. 超欧姆型热库环境下互感效应对磁通量子比特退相干的影响[J]. J4, 2012, 29(6): 714-722.

ZOU Xiong ，FENG Bin-bin ，JI Ying-hua . Mutual inductance’s influence to the flux qubits decoherence under super-Ohm thermal reservoir environment[J]. J4, 2012, 29(6): 714-722.

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