Conditional Dynamics of Optomechanical Two-Tone Backaction-Evading Measurements

Matteo Brunelli; Daniel Malz; Andreas Nunnenkamp

doi:10.1103/PhysRevLett.123.093602

Conditional Dynamics of Optomechanical Two-Tone Backaction-Evading Measurements

Matteo Brunelli^*
, Daniel Malz
, Andreas Nunnenkamp

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Abstract

Backaction-evading measurements of mechanical motion can achieve precision below the zero-point uncertainty and quantum squeezing, which makes them a resource for quantum metrology and quantum information processing. We provide an exact expression for the conditional state of an optomechanical system in a two-tone backaction-evading measurement beyond the standard adiabatic approximation and perform extensive numerical simulations to go beyond the usual rotating-wave approximation. We predict the simultaneous presence of conditional mechanical squeezing, intracavity squeezing, and optomechanical entanglement. We further apply an analogous analysis to the multimode optomechanical system of two mechanical and one cavity mode and find conditional mechanical Einstein-Podolski-Rosen entanglement and genuinely tripartite optomechanical entanglement. Our analysis is of direct relevance for ultrasensitive measurements and measurement-based control in high-cooperativity optomechanical sensors operating beyond the adiabatic limit.

Originalsprog	Engelsk
Artikelnummer	093602
Tidsskrift	Physical Review Letters
Vol/bind	123
Udgave nummer	9
ISSN	0031-9007
DOI	https://doi.org/10.1103/PhysRevLett.123.093602
Status	Udgivet - 29 aug. 2019
Udgivet eksternt	Ja

Bibliografisk note

Publisher Copyright:
© 2019 American Physical Society.

Finansiering

We thank A. Schliesser for discussions at an early stage of the project. M.B. thanks F. Albarelli, M. Genoni, and A. Serafini for useful discussions. D.M. acknowledges support by the Horizon 2020 ERC Advanced Grant Quantum Emitters in non-conventional baths (Grant Agreement No. 742102). A.N. acknowledges a University Research Fellowship from the Royal Society and additional support from the Winton Programme for the Physics of Sustainability. This work was supported by the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 732894 (FET Proactive HOT).

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Citationsformater

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abstract = "Backaction-evading measurements of mechanical motion can achieve precision below the zero-point uncertainty and quantum squeezing, which makes them a resource for quantum metrology and quantum information processing. We provide an exact expression for the conditional state of an optomechanical system in a two-tone backaction-evading measurement beyond the standard adiabatic approximation and perform extensive numerical simulations to go beyond the usual rotating-wave approximation. We predict the simultaneous presence of conditional mechanical squeezing, intracavity squeezing, and optomechanical entanglement. We further apply an analogous analysis to the multimode optomechanical system of two mechanical and one cavity mode and find conditional mechanical Einstein-Podolski-Rosen entanglement and genuinely tripartite optomechanical entanglement. Our analysis is of direct relevance for ultrasensitive measurements and measurement-based control in high-cooperativity optomechanical sensors operating beyond the adiabatic limit.",

author = "Matteo Brunelli and Daniel Malz and Andreas Nunnenkamp",

note = "Funding Information: We thank A. Schliesser for discussions at an early stage of the project. M.B. thanks F. Albarelli, M. Genoni, and A. Serafini for useful discussions. D.M. acknowledges support by the Horizon 2020 ERC Advanced Grant Quantum Emitters in non-conventional baths (Grant Agreement No. 742102). A.N. acknowledges a University Research Fellowship from the Royal Society and additional support from the Winton Programme for the Physics of Sustainability. This work was supported by the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 732894 (FET Proactive HOT). Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

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