Stationary optomechanical entanglement between a mechanical oscillator and its measurement apparatus
Artikel i vetenskaplig tidskrift, 2020
We provide an argument to infer stationary entanglement between light and a mechanical oscillator based on continuous measurement of light only. We propose an experimentally realizable scheme involving an optomechanical cavity driven by a resonant, continuous-wave field operating in the non-sideband-resolved regime. This corresponds to the conventional configuration of an optomechanical position or force sensor. We show analytically that entanglement between the mechanical oscillator and the output field of the optomechanical cavity can be inferred from the measurement of squeezing in (generalized) Einstein-Podolski-Rosen quadratures of suitable temporal modes of the stationary light field. Squeezing can reach levels of up to 50% of noise reduction below shot noise in the limit of large quantum cooperativity. Remarkably, entanglement persists even in the opposite limit of small cooperativity. Viewing the optomechanical device as a position sensor, entanglement between mechanics and light is an instance of object-apparatus entanglement predicted by quantum measurement theory.
Författare
C. Gut
Leibniz Universität Hannover
Universität Wien
K. Winkler
Universität Wien
J. Hoelscher-Obermaier
Universität Wien
S. G. Hofer
Universität Wien
Leibniz Universität Hannover
R. Moghadas Nia
Universität Wien
N. Walk
Freie Universität Berlin
A. Steffens
Freie Universität Berlin
J. Eisert
Freie Universität Berlin
Witlef Wieczorek
Universität Wien
J. A. Slater
Universität Wien
TU Delft
M. Aspelmeyer
Österreichische Akademie der Wissenschaften
Universität Wien
K. Hammerer
Leibniz Universität Hannover
PHYSICAL REVIEW RESEARCH
2643-1564 (eISSN)
Vol. 2 3 033244Ämneskategorier (SSIF 2011)
Atom- och molekylfysik och optik
Annan fysik
Annan elektroteknik och elektronik
DOI
10.1103/PhysRevResearch.2.033244