# Quantum correlations between light and the kilogram-mass mirrors of LIGO

@article{Yu2020QuantumCB, title={Quantum correlations between light and the kilogram-mass mirrors of LIGO}, author={Haocun Yu and L. McCuller and M. Tse and Lisa Barsotti and Nergis Mavalvala and Joe Betzwieser and C D Blair and Sheila E. Dwyer and Anamaria Effler and M. Evans and {\'A}lvaro Fern{\'a}ndez-Galiana and P. Fritschel and Valera Frolov and N Kijbunchoo and F. Matichard and D. E. McClelland and Terry Mcrae and Adam J Mullavey and Daniel Sigg and Bram J. J. Slagmolen and Chris Whittle and A. Buikema and Yujen Chen and Thomas R. Corbitt and Roman Schnabel and Richard J. Abbott and C. Adams and Rana X. Adhikari and Alena Ananyeva and Stephen Appert and Koji Arai and Joseph S. Areeda and Yasmeen Asali and Stuart M. Aston and C Austin and A. M. Baer and M. S. Ball and Stefan W. Ballmer and Sharan Banagiri and David Barker and Jeffrey Bartlett and B. K. Berger and Dripta Bhattacharjee and G Billingsley and S{\'e}bastien Biscans and R. M. Blair and Nina Bode and Phillip Booker and R. G. Bork and Alyssa Bramley and A. F. Brooks and D. D. Brown and C. Cahillane and Kipp C. Cannon and Xunchi Chen and Alexei A. Ciobanu and Filiberto Clara and Sam J. Cooper and K. Rainer Corley and Stefanie Countryman and P B Covas and D C Coyne and L. E. H. Datrier and D Davis and C. Di Fronzo and K L Dooley and J C Driggers and Peter Dupej and Todd Etzel and Thomas M. Evans and Jon R. Feicht and P. J. Fulda and Michael Fyffe and Joseph A. Giaime and K. D. Giardina and Patrick Godwin and E Goetz and Slawomir Gras and Corey Gray and Richard Carl Gray and Anna C. Green and Anchal Gupta and Eric K. Gustafson and Richard Gustafson and Jonathan Hanks and Joe Hanson and Terra Hardwick and R. K. Hasskew and Matthew Heintze and A. F. Helmling-Cornell and Nathan A. Holland and J. D. D. Jones and Shivaraj Kandhasamy and Sudarshan Karki and Marie Kasprzack and Keita Kawabe and P. J. King and Jeffrey Kissel and Rahul Kumar and Michael Landry and Benjamin Lane and Brian Thomas Lantz and Michael Laxen and Yannick K. Lecoeuche and J. N. Leviton and J.-X. Liu and Marc Lormand and A Lundgren and Ronaldas Macas and Myron Macinnis and D Macleod and Georgia L. Mansell and Szabolcs M'arka and Zsuzsa M'arka and D. V. Martynov and Kenneth R Mason and Thomas J. Massinger and Richard V. McCarthy and Scott McCormick and J D Mciver and Greg Mendell and Kara Merfeld and E. L. Merilh and Fabian Meylahn and Timesh Mistry and Richard K Mittleman and Gerardo Moreno and Conor M Mow-Lowry and S Mozzon and T. J. N. Nelson and P Nguyen and L K Nuttall and Jason Oberling and Richard J. Oram and Charles Osthelder and David J. Ottaway and Harry Overmier and Jordan Palamos and William Parker and Ethan Payne and Arnaud Pele and Carlos J. Perez and Marc Pirello and Hugh Radkins and K. E. Ramirez and Jonathan W. Richardson and Keith Riles and Norna A. Robertson and Jameson Graef Rollins and Chandra Romel and Janeen H. Romie and M P Ross and Kyle Ryan and Travis Sadecki and E. J. Sanchez and L. E. Sanchez and T. R. Saravanan and Richard L. Savage and Dean M. Schaetzl and Robert M. S. Schofield and Eyal Schwartz and Danny Sellers and Thomas Shaffer and John R. Lindsay Smith and S. Soni and Borja Sorazu and A P Spencer and Kenneth Strain and L. Sun and M. J. Szczepa'nczyk and M. Thomas and P. Thomas and Keith A. Thorne and Karl Toland and Calum I. Torrie and Gary Traylor and Alexander L. Urban and Gabriele Vajente and Guillermo Valdes and Daniel Vander-Hyde and Peter J. Veitch and K Venkateswara and Gautam Venugopalan and Aaron Viets and Thomas Vo and Cheryl Vorvick and Madeline Wade and Robert L. Ward and Jimmy Warner and Betsy Weaver and Rainer Weiss and Benno Willke and Christopher C. Wipf and L Xiao and H. Yamamoto and Hang Yu and Lei Zhang and Michael Edward Zucker and J. G. Zweizig}, journal={Nature}, year={2020}, volume={583}, pages={43-47} }

The measurement of minuscule forces and displacements with ever greater precision is inhibited by the Heisenberg uncertainty principle, which imposes a limit to the precision with which the position of an object can be measured continuously, known as the standard quantum limit 1 – 4 . When light is used as the probe, the standard quantum limit arises from the balance between the uncertainties of the photon radiation pressure applied to the object and of the photon number in the photoelectric… Expand

#### 35 Citations

Quantum Backaction on kg-Scale Mirrors: Observation of Radiation Pressure Noise in the Advanced Virgo Detector.

- Medicine, Physics
- Physical review letters
- 2020

Evidence of quantum radiation pressure noise in the Advanced Virgo gravitational wave detector is discussed and squeezed vacuum states of light are injected into the interferometer in order to manipulate the quantum backaction on the 42 kg mirrors and observe the corresponding quantum noise driven displacement at frequencies between 30 and 70 Hz. Expand

Demonstration of an amplitude filter cavity at gravitational-wave frequencies

- Physics
- 2020

Quantum vacuum fluctuations fundamentally limit the precision of optical measurements, such as those in gravitational-wave detectors. Injection of conventional squeezed vacuum can be used to reduce… Expand

Prospects for observing gravitational forces between nonclassical mechanical oscillators

- Physics
- 2020

Interfacing quantum mechanics and gravity is one of the great open questions in natural science. Micromechanical oscillators have been suggested as a plausible platform to carry out these… Expand

The Squeezed Light Source for the Advanced Virgo Detector in the Observation Run O3

- Physics
- 2020

From 1 April 2019 to 27 March 2020, the Advanced Virgo detector, together with the two Advanced LIGO detectors, conducted the third joint scientific observation run O3, aiming for further detections… Expand

Low phase noise squeezed vacuum for future generation gravitational wave detectors

- Physics
- 2020

Squeezed light has become a standard technique to enhance the sensitivity of gravitational wave detectors. Both optical losses and phase noise in the squeezed path can degrade the achievable… Expand

Quantum sensing with milligram scale optomechanical systems

- Mathematics, Physics
- 2020

Abstract Probing the boundary between classical and quantum mechanics has been one of the central themes in modern physics. Recently, experiments to precisely measure the force acting on milligram… Expand

Optimal quantum resource distribution in quantum dense metrology

- Physics
- 2020

Quantum entanglement can engineer the statical distribution of photons and then lead to the enhancement of measurement sensitivity. However, the generated entanglement couldn't be infinite. Quantum… Expand

Quantum fluctuations have been shown to affect macroscopic objects

- Physics, Medicine
- Nature
- 2020

A method has been reported that improves the precision of measurements made by gravitational-wave detectors beyond an intrinsic limit — and shows that quantum fluctuations can alter the position of… Expand

Adaptive Circuit Learning for Quantum Metrology

- Computer Science, Physics
- 2020

This work uses a circuit learning approach to search for encoder and decoder circuits that scalably improve sensitivity under given application and noise characteristics and demonstrates a 1.69x SNR improvement over the classical limit on a 5-qubit IBM quantum computer. Expand

Hilbert–Schmidt speed as an efficient figure of merit for quantum estimation of phase encoded into the initial state of open n-qubit systems

- Medicine
- Scientific reports
- 2021

It is found that, when both HSS and quantum Fisher information are calculated with respect to the phase parameter encoded into the initial state of an n-qubit register, the zeros of the HSS dynamics are actually equal to those of the QFI dynamics. Expand

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Evidence of quantum radiation pressure noise in the Advanced Virgo gravitational wave detector is discussed and squeezed vacuum states of light are injected into the interferometer in order to manipulate the quantum backaction on the 42 kg mirrors and observe the corresponding quantum noise driven displacement at frequencies between 30 and 70 Hz. Expand

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