Indirect detection of gravitons through quantum entanglement
Indirect detection of gravitons through quantum entanglement
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DOI：
10.1103/physrevd.104.083516
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发表时间：
2021-03
影响因子：
5
通讯作者：
S. Kanno;J. Soda;Junsei Tokuda
中科院分区：
文献类型：
--
作者：
S. Kanno;J. Soda;Junsei Tokuda
我们提出了一个实验，通过韧致辐射的引力子噪声破坏了悬挂在等臂干涉仪末端的两个宏观镜之间的纠缠。通过计算噪声的相关函数，由退相干泛函得到退相干时间。我们估计，对于40 km长的臂和40 kg重的镜，由暴胀产生的压缩态引力子噪声引起的退相干时间约为20秒。我们的分析表明，对量子纠缠退相干时间的观测具有间接探测引力子的潜力。这种对引力子的间接探测将为量子引力提供强有力的证据。
We propose an experiment that the entanglement between two macroscopic mirrors suspended at the end of an equal-arm interferometer is destroyed by the noise of gravitons through bremsstrahlung. By calculating the correlation function of the noise, we obtain the decoherence time from the decoherence functional. We estimate that the decoherence time induced by the noise of gravitons in squeezed states stemming from inflation is approximately 20 seconds for 40 km long arms and 40 kg mirrors. Our analysis shows that observation of the decoherence time of quantum entanglement has the potential to detect gravitons indirectly. This indirect detection of gravitons would give strong evidence of quantum gravity.