arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.06507quant-ph
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用量子光机系统最优估计含时引力场

Optimal estimation of time-dependent gravitational fields with quantum optomechanical systems

Sofia Qvarfort, A. Douglas K. Plato, David Edward Bruschi, Fabienne Schneiter, Daniel Braun, Alessio Serafini, Dennis Rätzel

摘要:

我们研究了在非线性状态下理想光机系统测量时变引力场的基本灵敏度。利用最近发展起来的方法来解决与时间相关的哈密顿量的非线性光学机械系统的动力学,我们计算的量子费舍尔信息的线性位移的机械元件,由于重力。我们证明,不仅可以通过注入腔场的压缩态进一步提高灵敏度,而且还可以通过调制光-物质耦合的光机系统。我们特别适用于我们的研究结果的引力场从小振荡质量的测量,在那里,我们表明,在原则上,引力场的振荡纳克质量可以检测到的实验参数的基础上,将可能在不久的将来访问。最后,我们确定的实验参数制度所需的引力波探测与量子光机械传感器。

英文摘要:

We study the fundamental sensitivity that can be achieved with an ideal optomechanical system in the nonlinear regime for measurements of time-dependent gravitational fields. Using recently developed methods to solve the dynamics of a nonlinear optomechanical system with a time-dependent Hamiltonian, we compute the quantum Fisher information for linear displacements of the mechanical element due to gravity. We demonstrate that the sensitivity can not only be further enhanced by injecting squeezed states of the cavity field, but also by modulating the light--matter coupling of the optomechanical system. We specifically apply our results to the measurement of gravitational fields from small oscillating masses, where we show that, in principle, the gravitational field of an oscillating nano-gram mass can be detected based on experimental parameters that will likely be accessible in the near-term future. Finally, we identify the experimental parameter regime necessary for gravitational wave detection with a quantum optomechanical sensor.

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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