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：
暂无
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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页码：1 / 9
页数：8
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[21]  
Leggett A.J.(2010)Decoherence dynamics of coherent electronic excited states in the photosynthetic purple bacterium Rhodobacter sphaeroides Phys. Rev. E 81 undefined-undefined
[22]  
Chakravarty S.(2005)Non-Markovian dynamics of double quantum dot charge qubits due to acoustic phonons Phys. Rev. B 72 undefined-undefined
[23]  
Dorsey A.T.(2010)Damping of exciton Rabi rotations by acoustic phonons in optically excited InGaAs/GaAs quantum dots Phys. Rev. Lett. 104 undefined-undefined
[24]  
Fisher M.P.A.(2011)Coherent and incoherent dynamics in excitonic energy transfer: correlated fluctuations and off-resonance effects Phys. Rev. B 83 undefined-undefined
[25]  
Garg A.(undefined)undefined undefined undefined undefined-undefined
[26]  
Zwerger W.(undefined)undefined undefined undefined undefined-undefined
[27]  
Valiev K.A.(undefined)undefined undefined undefined undefined-undefined
[28]  
Xiang S.H.(undefined)undefined undefined undefined undefined-undefined
[29]  
Shao B.(undefined)undefined undefined undefined undefined-undefined
[30]  
Song K.H.(undefined)undefined undefined undefined undefined-undefined
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