Decoherence dynamics of a charge qubit coupled to the noise bath

被引：0
|
作者：
Yang Qin-Ying [1 ]
Liang Bao-Long [1 ]
Wang Ji-Suo [1 ,2 ]
机构：
[1] Liaocheng Univ, Sch Phys Sci & Informat Engn, Liaocheng 252059, Peoples R China
[2] Qufu Normal Univ, Coll Phys & Engn, Qufu 273165, Peoples R China
来源：
CHINESE PHYSICS B | 2013年 / 22卷 / 07期
基金：
中国国家自然科学基金;
关键词：
charge qubit; decoherence; response function; norm; QUANTUM; COHERENT;
D O I：
10.1088/1674-1056/22/7/070301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
By virtue of the canonical quantization method, we present a quantization scheme for a charge qubit based on the superconducting quantum interference device (SQUID), taking the self-inductance of the loop into account. Under reasonable short-time approximation, we study the effect of decoherence in the ohmic case by employing the response function and the norm. It is confirmed that the decoherence time, which depends on the parameters of the circuit components, the coupling strength, and the temperature, can be as low as several picoseconds, so there is enough time to record the information.
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页数：6
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