Quantum correlation measurements in interferometric gravitational wave detectors

D. V. Martynov, N.A. Lockerbie, LSC Instrument Authors

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)
30 Downloads (Pure)


Quantum fluctuations in the phase and amplitude quadratures of light set limitations on the sensitivity of modern optical instruments. The sensitivity of the interferometric gravitational-wave detectors, such as the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO), is limited by quantum shot noise, quantum radiation pressure noise, and a set of classical noises. We show how the quantum properties of light can be used to distinguish these noises using correlation techniques. Particularly, in the first part of the paper we show estimations of the coating thermal noise and gas phase noise, hidden below the quantum shot noise in the Advanced LIGO sensitivity curve. We also make projections on the observatory sensitivity during the next science runs. In the second part of the paper we discuss the correlation technique that reveals the quantum radiation pressure noise from the background of classical noises and shot noise. We apply this technique to the Advanced LIGO data, collected during the first science run, and experimentally estimate the quantum correlations and quantum radiation pressure noise in the interferometer.
Original languageEnglish
Article number043831
Number of pages12
JournalPhysical Review A
Issue number4
Publication statusPublished - 21 Apr 2017


  • quantum fluctuations
  • quantum measurements
  • gravitational wave detection


Dive into the research topics of 'Quantum correlation measurements in interferometric gravitational wave detectors'. Together they form a unique fingerprint.

Cite this