2025-10-09 カーディフ大学
The Gravity Exploration Team was able to achieve record-breaking levels of sensitivity with the Quantum Enhanced Space-Time measurement (QUEST) in just a three-hour experiment.
＜関連情報＞
- https://www.cardiff.ac.uk/news/view/2954067-worlds-most-sensitive-table-top-experiment-sets-new-limits-on-very-high-frequency-gravitational-waves
- https://journals.aps.org/prl/abstract/10.1103/61j9-cjkk
卓上干渉計対による確率的長さ変動の広帯域限界 Broadband Limits on Stochastic Length Fluctuations from a Pair of Table-Top Interferometers
Abhinav Patra, Lorenzo Aiello, Aldo Ejlli, William L. Griffiths, Alasdair L. James, Nikitha Kuntimaddi, Ohkyung Kwon, Eyal Schwartz, Henning Vahlbruch et al.
Physical Review Letters Published: 3 September, 2025
DOI: https://doi.org/10.1103/61j9-cjkk
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/√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 104 s, the averaging of the cross-correlation spectra between the two interferometer signals resulted in a strain sensitivity of 3×10−20 1/√Hz, making QUEST the most sensitive table-top interferometric system to date.
