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 re...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2024-12
Main Authors: Patra, Abhinav, Aiello, Lorenzo, Ejlli, Aldo, Griffiths, William L, James, Alasdair L, Kuntimaddi, Nikitha, Kwon, Ohkyung, Schwartz, Eyal, Vahlbruch, Henning, Vermeulen, Sander M, Kokeyama, Keiko, Dooley, Katherine L, Grote, Hartmut
Format: Article
Language:English
Subjects:
Broadband
Cross correlation
Gravitational waves
Michelson interferometers
Noise sensitivity
Radio frequency
Spectral sensitivity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2331-8422