A quantum-enhanced prototype gravitational-wave detector

By Keisuke Goda, O. Miyakawa, E. Mikhailov, S. Saraf, Rana X. Adhikari, K. McKenzie, R. Ward, S. Vass, A. Weinstein, N. Mavalvala. 2008

303 citations recorded by the source corpus.

The quantum nature of the electromagnetic field imposes a fundamental limit on the sensitivity of optical precision measurements such as spectroscopy, microscopy and interferometry. The so-called quantum limit is set by the zero-point fluctuations of the electromagnetic field, which constrain the precision with which optical signals can be measured. In the world of precision measurement, laser-interferometric gravitational-wave detectors, are the most sensitive position meters ever operated, capable of measuring distance changes of the order of 10- 18 m r.m.s. over kilometre separations caused by gravitational waves from astronomical sources. The sensitivity of currently operational and future gravitational-wave detectors is limited by quantum optical noise. Here, we demonstrate a 44% improvement in displacement sensitivity of a prototype gravitational-wave detector with suspended quasi-free mirrors at frequencies where the sensitivity is shot-noise-limited, by injecting a squeezed state of light. This demonstration is a critical step towards implementation of squeezing-enhancement in large-scale gravitational-wave detectors.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/8d2725b7d8da1a57c22e1071dc2cc8fda3c5d09b

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Citations in the corpus

A gravitational wave observatory operating beyond the quantum shot-noise limit: Squeezed light in application (2011, background): “In parallel, proof-of-principle experiments at higher frequencies have shown that small-scale Michelson-interferometer sensitivities can indeed be improved by squeezing (20, 21).”
Gravitational Radiation Detection with Laser Interferometry (2013, background): “In the last few years, moderate levels of noise improvement have been observed from injecting squeezed light into a suspended prototype (Goda et al. , 2008) as well as the GE0600 (LIGO Scientiﬁc Collaboration et al. , 2011) and Enhanced LIGO (Abadie et al. , 2012; Dwyer, 2012) detectors.”
Enhancing the sensitivity of the LIGO gravitational wave detector by using squeezed states of light (2013, methodology): “Since then, squeezed vacuum has been used to enhance the sensitivity of a prototype interferometer [13].”
Enhanced sensitivity of the LIGO gravitational wave detector by using squeezed states of light (2013, methodology): “Since then, squeezed vacuum has been used to enhance the sensitivity of a prototype interferometer [13].”
On-Chip Optical Squeezing (2013, background): “Quantum properties of light can be used in a myriad of applications ranging from enhanced sensing [1,2] to spectroscopy [3,4] to metrology [5,6] and quantum-information processing [7,8].”
Squeezed states of light and their applications in laser interferometers (2016, background): “(2005, 2006, 2007, 2008); Goda et al. (2008)] the implementation of a squeezed-light source in GEO 600 has resulted in the first sensitivity improvement beyond shot noise of a measurement device that targets new observations in nature.”
Spin squeezing, entanglement and quantum metrology with Bose–Einstein condensates (2012, background): “[4] Goda K, Miyakawa O, Mikhailov E E, Saraf S, Adhikari R, McKenzie K, Ward R, Vass S, Weinstein A J, and Mavalvala N 2008 A quantum-enhanced prototype gravitational-wave detector Nature Physics 4 472–476.”
Three-photon energy–time entanglement (2012, background): “The entanglement of discrete particle properties has been studied extensively in the context of quantum computing [4], cryptography [5], and quantum repeaters [6] while entanglement between the continuous properties of particles may play a critical role in improving the sensitivity of gravitational ”
Quantum spin squeezing (2010, methodology): “, in the Ramsey spectroscopy [2, 3, 33, 34, 35, 36, 37, 38, 8, 39], and in making more precise atom clocks [3, 5, 7, 23, 40, 41, 42, 43, 44] and gravitational-wave interferometers [45, 46, 47].”