Experimental limits for low-frequency space-time fluctuations from ultrastable optical resonators
Experimental limits for low-frequency space-time fluctuations from ultrastable optical resonators
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超稳定光学谐振腔低频时空涨落的实验极限
DOI：
10.1103/physrevd.69.027504
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发表时间：
2004
影响因子：
5
通讯作者：
A. Peters
中科院分区：
文献类型：
--
作者：
S. Schiller;Claus Lämmerzahl;Holger Müller;C. Braxmaier;Sven Herrmann;A. Peters
有人提出，由于时空内在的量子性质，它可能会经历涨落。这些波动将对以任意精度测量距离的能力构成基本限制，超出了标准量子力学的任何限制。激光干涉仪最近被认为适合于研究时空涨落的存在。在这里，我们给出了在1到0.5赫兹的范围内寻找极低起伏频率的时空起伏的结果。采用低温工作的蓝宝石制成的刚性光学干涉仪。我们找到了归一化距离噪声谱密度在6 MHz时的$1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}24}{\mathrm{Hz}}^{\ensuremath{-}1}$上限和$1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}28}{\mathrm{Hz}}^{\ensuremath{-}1}$在5 MHz以上的上限，并为最近提出的随机游走假说的参数建立了一个实验上限。
It has been suggested that space-time might undergo fluctuations because of its intrinsic quantum nature. These fluctuations would pose a fundamental limit to the ability of measuring distances with arbitrary precision, beyond any limitations due to standard quantum mechanics. Laser interferometers have recently been proposed as being suited for a search for the existence of space-time fluctuations. Here we present results of a search for space-time fluctuations of very low fluctuation frequencies, in the range from 1 \ensuremath{\mu}Hz to 0.5 Hz. Rigid optical interferometers made out of sapphire and operated at cryogenic temperature were used. We find an upper limit of $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}24}{\mathrm{Hz}}^{\ensuremath{-}1}$ for the normalized distance noise spectral density at 6 \ensuremath{\mu}Hz, and of $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}28}{\mathrm{Hz}}^{\ensuremath{-}1}$ above 5 mHz, and establish an experimental limit for the parameter of a recently proposed random-walk hypothesis.