Decoherence Dynamics of a Superconducting Charge Qubit Coupled to a Boson Bath and a Spin Bath

被引：0
作者：
Qin-Ying Yang
Bao-Long Liang
Ji-Suo Wang
机构：
[1] Liaocheng University,Shandong Provincial Key Laboratory of Optical Communication Science and Technology, School of Physical Science and Information Engineering
[2] Qufu Normal University,College of Physics and Engineering
来源：
International Journal of Theoretical Physics | 2014年 / 53卷
关键词：
Superconducting charge qubit; Spin-boson model; Spectral density; Decoherence;
D O I：
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中图分类号：
学科分类号：
摘要：
By virtue of a superconducting charge qubit, we derive the off-diagonal matrix operator and investigate the decoherence of the system in different regimes coupled to, respectively, the boson bath and the spin bath. It is found that the two different baths make a bit of difference on the decay of the system at low but finite temperature and the decoherence of the system is most closely linked with the regime as well as the coupling strength. Therefore, by optimizing some reasonable parameters, we can suppress appropriately the decoherence of a given quantum system.
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页数：8
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共 71 条
[1]  
Petta J.R.(2004)Manipulation of a single charge in a double quantum dot Phys. Rev. Lett. 93 1338-undefined
[2]  
Johnson A.C.(2004)Error rate of a charge qubit coupled to an acoustic phonon reservoir Phys. Rev. A 69 1791-undefined
[3]  
Marcus C.M.(1960)Ensemble method in the theory of irreversibility J. Chem. Phys. 33 65-undefined
[4]  
Hanson M.P.(2012)Dissipative dynamics of quantum correlations in the strong-coupling regime Phys. Lett. A 376 4600-undefined
[5]  
Gossard A.C.(2005)Study of temperature dependence of electron-phonon relaxation and dephasing in semiconductor double-dot nanostructures IEEE Trans. Nanotechnol. 4 957-undefined
[6]  
Fedichin L.(2005)Non-Markovian dynamics and phonon decoherence of a double quantum dot charge qubit Phys. Rev. B 72 60010-undefined
[7]  
Fedorov A.(1995)Tensor propagator for iterative quantum time evolution of reduced density matrices, I: theory J. Chem. Phys. 102 324-undefined
[8]  
Zwanzig R.(2003)Initial decoherence of open quantum systems J. Stat. Phys. 110 1-undefined
[9]  
Altintas F.(2010)Witness for initial system-environment correlations in open-system dynamics Europhys. Lett. 92 1-undefined
[10]  
Eryigit R.(1936)On the process of space quantization Phys. Rev. 49 1467-undefined
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