Broadband limits on stochastic length fluctuations from a pair of table-top interferometers
Broadband limits on stochastic length fluctuations from a pair of table-top interferometers
The Quantum-Enhanced Space-Time (QUEST) experiment consists of a pair of co-located Power Recycled Michelson Interferometers, each designed to have a broadband, shot-noise limited displacement sensitivity of $2\times10^{-19}$ $\mathrm{m/\sqrt{Hz}}$ from 1 to 200 MHz. Here we present the first results of QUEST that set new upper limits on correlated length fluctuations from 13 to 80 MHz, constituting the first broadband constraints for a stochastic gravitational wave background at these frequencies. In a coincident observing run of $10^{4}$ s the averaging of the cross-correlation spectra between the two interferometer signals resulted in a strain sensitivity of $3\times10^{-20}$ $\mathrm{1/\sqrt{Hz}}$ at 40 MHz, making QUEST the most sensitive table-top interferometric system to date.
Abhinav Patra、Lorenzo Aiello、Aldo Ejlli、William L. Griffiths、Alasdair L. James、Nikitha Kuntimaddi、Ohkyung Kwon、Eyal Schwartz、Henning Vahlbruch、Sander M. Vermeulen、Keiko Kokeyama、Katherine L. Dooley、Hartmut Grote
物理学
Abhinav Patra,Lorenzo Aiello,Aldo Ejlli,William L. Griffiths,Alasdair L. James,Nikitha Kuntimaddi,Ohkyung Kwon,Eyal Schwartz,Henning Vahlbruch,Sander M. Vermeulen,Keiko Kokeyama,Katherine L. Dooley,Hartmut Grote.Broadband limits on stochastic length fluctuations from a pair of table-top interferometers[EB/OL].(2025-06-19)[2025-07-16].https://arxiv.org/abs/2410.09175.点此复制
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