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arXiv 1906.08808quant-phgr-qc
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引力引起的可观测量子纠缠

Observable quantum entanglement due to gravity

Tanjung Krisnanda, Guo Yao Tham, Mauro Paternostro, Tomasz Paterek

摘要:

到目前为止,还没有实验提供引力相互作用的量子特征的证据。最近提出的测试表明,寻找大质量物体之间量子纠缠的产生,作为观察这种特征的可能途径。受镜面光学冷却技术进展的启发,本文系统地研究了引力耦合的两个质量之间的纠缠。我们首先考虑一直被困在谐振势中的质量(光力学),然后考虑从陷阱中释放出来的质量。这导致的引力诱导纠缠的观测所需的实验参数的估计。光机械装置需要LIGO一样的镜子和压缩或长的相干时间,但释放的质量可以是光,并在比其相干时间短的时间尺度内积累可检测的纠缠。在演化过程中没有宏观量子叠加。我们讨论了此类思想实验对引力耦合性质的影响。

英文摘要:

No experiment to date has provided evidence for quantum features of the gravitational interaction. Recently proposed tests suggest looking for the generation of quantum entanglement between massive objects as a possible route towards the observation of such features. Motivated by advances in optical cooling of mirrors, here we provide a systematic study of entanglement between two masses that are coupled gravitationally. We first consider the masses trapped at all times in harmonic potentials (optomechanics) and then the masses released from the traps. This leads to the estimate of the experimental parameters required for the observation of gravitationally induced entanglement. The optomechanical setup demands LIGO-like mirrors and squeezing or long coherence times, but the released masses can be light and accumulate detectable entanglement in a timescale shorter than their coherence times. No macroscopic quantum superposition develops during the evolution. We discuss the implications from such thought experiments regarding the nature of the gravitational coupling.

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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