Quantum estimation of the Schwarzschild spacetime parameters of the Earth
Quantum estimation of the Schwarzschild spacetime parameters of the Earth
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DOI：
10.1103/physrevd.90.124001
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发表时间：
2014-12-01
影响因子：
5
通讯作者：
Fuentes, Ivette
中科院分区：
文献类型：
--
作者：
Bruschi, David Edward;Datta, Animesh;Fuentes, Ivette
我们提出了一项量子实验来高精度测量地球的史瓦西时空参数。该方案还可以通过考虑地球时空曲率来测量距离。当（纠缠）光波包从地球发送到卫星时，由于时空曲率，它会发生红移和变形。传播后的测量可以估计时空参数。我们将我们的结果与涉及经典测量方法的最新技术进行比较，并讨论天基量子实验需要哪些发展才能改进当前对地球史瓦西半径的测量。
We propose a quantum experiment to measure with high precision the Schwarzschild spacetime parameters of the Earth. The scheme can also be applied to measure distances by taking into account the curvature of the Earth's spacetime. As a wave packet of (entangled) light is sent from the Earth to a satellite it is redshifted and deformed due to the curvature of spacetime. Measurements after the propagation enable the estimation of the spacetime parameters. We compare our results with the state of the art, which involves classical measurement methods, and discuss what developments are required in space-based quantum experiments to improve on the current measurement of the Schwarzschild radius of the Earth.