Physical Sciences Division
Published September 3, 2025 | Version v1
Journal article Metadata-only

Broadband Limits on Stochastic Length Fluctuations from a Pair of Table-Top Interferometers

Creators

  • 1. Cardiff University
  • 2. University of Chicago
  • 3. Max-Planck-Institute for Gravitational Physics

Description

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.

Additional details

Identifiers

DOI
10.1103/61j9-cjkk
Other
oai:uchicago.tind.io:16225

Funding

Science and Technology Facilities Council
ST/T006331/1
Leverhulme Trust
RPG-2019-022
Deutsche Forschungsgemeinschaft
EXC-2123
Cardiff University
Science and Technology Facilities Council
ST/W006456/1
Science and Technology Facilities Council
ST/W507374/1
Deutsche Forschungsgemeinschaft
390837967

UChicago Information

Division(s)
Physical Sciences Division
Department(s)
Physics