Gravitational parameter estimation in a waveguide
Gravitational parameter estimation in a waveguide
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DOI：
10.1103/physrevd.90.024022
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发表时间：
2014-07-08
影响因子：
5
通讯作者：
Fuentes, Ivette
中科院分区：
文献类型：
--
作者：
Doukas, Jason;Westwood, Luke;Fuentes, Ivette
我们调查的准确性，可以测量从散射实验的静态时空的内在不确定性。特别是，我们专注于史瓦西黑洞和空间扭结度量，有一些数学上的相似之处膨胀的宇宙。在选定的条件下，我们发现，散射问题可以在一个有损玻色子通道，这使我们能够识别散粒噪声缩放作为最终的缩放限制的时空的估计。粒子计数测量的福克态探测器达到这个最终的标度极限和每个时空的标度常数的计算和比较的相干态探测器与外差和零差测量的实际策略。提出了一种分析光波导中模拟时空量子极限的有效方法。
We investigate the intrinsic uncertainty in the accuracy to which a static spacetime can be measured from scattering experiments. In particular, we focus on the Schwarzschild black hole and a spatially kinked metric that has some mathematical resemblance to an expanding universe. Under selected conditions we find that the scattering problem can be framed in terms of a lossy bosonic channel, which allows us to identify shot-noise scaling as the ultimate scaling limit to the estimation of the spacetimes. Fock state probes with particle counting measurements attain this ultimate scaling limit and the scaling constants for each spacetime are computed and compared to the practical strategies of coherent state probes with heterodyne and homodyne measurements. A promising avenue to analyze the quantum limit of the analogue spacetimes in optical waveguides is suggested.