Broadband limits on stochastic length fluctuations from a pair of table-top interferometers

authored by: Abhinav Patra, Lorenzo Aiello, Aldo Ejlli, William L. Griffiths, Alasdair L. James, Nikitha Kuntimaddi, Ohkyung Kwon, Eyal Schwartz, Henning Fedor Cornelius Vahlbruch, Sander M. Vermeulen, Keiko Kokeyama, Katherine L. Dooley, Hartmut Grote
Abstract: The Quantum-Enhanced Space-Time (QUEST) experiment consists of a pair of colocated power recycled Michelson interferometers, each designed to have a broadband, shot-noise-limited displacement sensitivity of 2×10^{-19} m/sqrt[Hz] from 1 to 200 MHz. Here, we present the first results of QUEST, with a search up to 80 MHz, 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 3×10^{-20} 1/sqrt[Hz], making QUEST the most sensitive table-top interferometric system to date.
Organisation(s): QuantumFrontiers
External Organisation(s): Cardiff University
Gran Sasso Science Institute
Istituto Nazionale di Fisica Nucleare (INFN)
Tor Vergata University of Rome
California Institute of Caltech (Caltech)
Louisiana State University
Type: Article
Journal: Physical review letters
Volume: 135
Pages: 101402
No. of pages: 1
ISSN: 0031-9007
Publication date: 03.09.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Physics and Astronomy
Electronic version(s): https://doi.org/10.1103/61j9-cjkk (Access: Open)
https://doi.org/10.48550/arXiv.2410.09175 (Access: Open)

BibTeX

@article{d9f9f44682514ab8832ab69b5453df62,
title = "Broadband limits on stochastic length fluctuations from a pair of table-top interferometers",
abstract = "The Quantum-Enhanced Space-Time (QUEST) experiment consists of a pair of colocated power recycled Michelson interferometers, each designed to have a broadband, shot-noise-limited displacement sensitivity of 2×10^{-19} m/sqrt[Hz] from 1 to 200 MHz. Here, we present the first results of QUEST, with a search up to 80 MHz, 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 3×10^{-20} 1/sqrt[Hz], making QUEST the most sensitive table-top interferometric system to date.",
author = "Abhinav Patra and Lorenzo Aiello and Aldo Ejlli and Griffiths, {William L.} and James, {Alasdair L.} and Nikitha Kuntimaddi and Ohkyung Kwon and Eyal Schwartz and Vahlbruch, {Henning Fedor Cornelius} and Vermeulen, {Sander M.} and Keiko Kokeyama and Dooley, {Katherine L.} and Hartmut Grote",
note = "Publisher Copyright: {\textcopyright} 2025 authors. Published by the American Physical Society.",
year = "2025",
month = sep,
day = "3",
doi = "10.1103/61j9-cjkk",
language = "English",
volume = "135",
pages = "101402",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "10",
}