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arXiv 2007.14094quant-ph
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非马尔可夫区域中具有初始系统关联的优化边带冷却

Optimized sideband cooling with initial system correlations in non-Markovian regime

Wen-Zhao Zhang, Ting Tan, Jie Zhao, Wenlin Li, Jiong Cheng

AI总结:

研究非马尔可夫区域中具有初始系统关联的标准光机械系统优化边带冷却,通过引入冷却速率和平均声子减少函数,发现特定初始关联可显著降低声子数并加速基态冷却,结合Q调制技术实现快速稳定的机械基态制备。

摘要:

研究了在存在初始系统关联的情况下,与一般机械非马尔可夫储层耦合的标准光机械系统的优化边带冷却。我们通过将初始关联的影响纳入海森堡方程中的含时系数来研究声子数的演化。我们引入了冷却速率的概念,并定义了平均声子减少函数来描述非马尔可夫区域中的边带冷却效应。结果表明,通过引入参量放大型或分束器型初始关联,可以显著降低瞬时声子数。此外,通过增强分束器型初始关联,可以加速基态冷却速率。通过优化系统的初始状态并利用Q调制技术,可以在极短时间内获得稳定的机械基态。我们的优化冷却协议为固态系统中的声子操控和量子信息处理提供了一个极具吸引力的平台。

英文摘要:

An optimized sideband cooling in the presence of initial system correlations is investigated for a standard optomechanical system coupled to a general mechanical non-Markovian reservoir. We study the evolution of phonon number by incorporating the effects of initial correlations into the time-dependent coefficients in the Heisenberg equation. We introduce the concept of cooling rate and define an average phonon reduction function to describe the sideband cooling effect in non-Markovian regime. Our results show that the instantaneous phonon number can be significantly reduced by introducing either the parametric-amplification type or the beam-splitter type initial correlations. In addition, the ground state cooling rate can be accelerated by enhancing the initial correlation of beam-splitter type. By optimizing the initial state of the system and utilizing Q-modulation technology, a stable mechanical ground state can be obtained in a very short time. Our optimized cooling protocol provides an appealing platform for phonon manipulation and quantum information processing in solid-state systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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