標題: Communication: Engineered tunable decay rate and controllable dissipative dynamics
作者: Lu, Zhiguo
Zheng, Hang
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
關鍵字: boson systems;coherence;harmonic oscillators;quantum computing;tunnelling
公開日期: 28-三月-2012
摘要: We investigate the steering dissipative dynamics of a two-level system (qubit) by means of the modulation of an assisted tunneling degree of freedom which is described by a quantum-oscillator spin-boson model. Our results reveal that the decoherence rate of the qubit can be significantly suppressed and simultaneously its quality factor is enhanced. Moreover, the modulated dynamical susceptibility exhibits a multi-peak feature which is indicative of the underlying structure and measurable in experiment. Our findings demonstrate that the interplay between the combined degrees of freedom and the qubit is crucial for reducing the dissipation of qubit and expanding the coherent regime of quantum operation much large. The strategy might be used to fight against deterioration of quantum coherence in quantum information processing. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3700437]
URI: http://dx.doi.org/121103
http://hdl.handle.net/11536/16110
ISSN: 0021-9606
DOI: 121103
期刊: JOURNAL OF CHEMICAL PHYSICS
Volume: 136
Issue: 12
結束頁: 
顯示於類別:期刊論文


文件中的檔案:

  1. 000302216200003.pdf