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.
Details
- 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 )
