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arXiv 1807.04718quant-ph
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腔光力学中混合态压缩的量子最优控制

Quantum Optimal Control for Mixed State Squeezing in Cavity Optomechanics

Daniel Basilewitsch, Christiane P. Koch, Daniel M. Reich

摘要:

量子技术中关键任务的性能,如精确的状态准备,可以通过利用外部控制并利用最优控制理论导出它们的形状来最大化。对于非纯目标状态,性能度量需要匹配广义Bloch向量的角度和长度。我们引入了一个措施,这个简单的几何图片的基础上,分离角度和长度不匹配到单独的条款,并适用于随后的优化框架,以最大限度地压缩的光机械振荡器在有限的温度。我们的研究结果表明,整形腔驱动器可以加快压缩态制备超过两个数量级。为此目的所需的协同性和脉冲形状与当前的实验技术完全兼容。

英文摘要:

The performance of key tasks in quantum technology, such as accurate state preparation, can be maximized by utilizing external controls and deriving their shape with optimal control theory. For non-pure target states, the performance measure needs to match both angle and length of the generalized Bloch vector. We introduce a measure based on this simple geometric picture that separates angle and length mismatch into individual terms and apply the ensuing optimization framework to maximize squeezing of an optomechanical oscillator at finite temperature. Our results show that shaping the cavity drives can speed up squeezed state preparation by more than two orders of magnitude. Cooperativities and pulse shapes required to this end are fully compatible with current experimental technology.

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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