Non-Markovian master equation for a damped oscillator with time-varying parameters
Publication in refereed journal

香港中文大學研究人員

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摘要We derive an exact non-Markovian master equation that generalizes the previous work [Hu, Paz and Zhang, Phys. Rev. D 45, 2843 (1992)] to damped harmonic oscillators with time-varying parameters. This is achieved by exploiting the linearity of the system and operator solution in Heisenberg picture. Our equation governs the non-Markovian quantum dynamics when the system is modulated by external devices. As an application, we apply our equation to parity kick decoupling problems. The time-dependent dissipative coefficients in the master equation are shown to be modified drastically when the system is driven by pi pulses. For coherence protection to be effective, our numerical results indicate that kicking period should be shorter than memory time of the bath. The effects of using soft pulses in an ohmic bath are also discussed.
著者Chang KW, Law CK
期刊名稱Physical Review A
出版年份2010
月份5
日期1
卷號81
期次5
出版社American Physical Society
國際標準期刊號1050-2947
電子國際標準期刊號1094-1622
語言英式英語
Web of Science 學科類別Optics; OPTICS; Physics; Physics, Atomic, Molecular & Chemical; PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

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