TY - JOUR
T1 - Optimal quantum noise cancellation with an entangled witness channel
AU - Gould, Daniel W.
AU - Yap, Min Jet
AU - Adya, Vaishali B.
AU - Slagmolen, Bram J.J.
AU - Ward, Robert L.
AU - McClelland, David E.
N1 - Publisher Copyright:
© 2021 authors.
PY - 2021/12
Y1 - 2021/12
N2 - We present the digital signal processing of a mutually entangled, two-mode squeezed state using Wiener filtering to maximize the reduction of quantum noise of a single mode. By conditioning this mode, the signal, with its directly detected entangled pair, the witness, we show quantum noise cancellation of 2 dB below that of the signal vacuum level. We present the frequency-dependent digital recovery of squeezed states with Wiener filtering. This filtering is particularly relevant for gravitational wave detectors which will seek to use frequency-dependent squeezed states to improve their reach to the observable universe. We demonstrate the recovery of squeezed states in a configuration that replicates one which would provide optimum sensitivity improvement in a gravitational wave detector under the effects of radiation pressure noise. More generally, this technique may find application in other quantum-limited high-precision experiments such as those using optomechanical cavities.
AB - We present the digital signal processing of a mutually entangled, two-mode squeezed state using Wiener filtering to maximize the reduction of quantum noise of a single mode. By conditioning this mode, the signal, with its directly detected entangled pair, the witness, we show quantum noise cancellation of 2 dB below that of the signal vacuum level. We present the frequency-dependent digital recovery of squeezed states with Wiener filtering. This filtering is particularly relevant for gravitational wave detectors which will seek to use frequency-dependent squeezed states to improve their reach to the observable universe. We demonstrate the recovery of squeezed states in a configuration that replicates one which would provide optimum sensitivity improvement in a gravitational wave detector under the effects of radiation pressure noise. More generally, this technique may find application in other quantum-limited high-precision experiments such as those using optomechanical cavities.
UR - http://www.scopus.com/inward/record.url?scp=85119440063&partnerID=8YFLogxK
U2 - 10.1103/PhysRevResearch.3.043079
DO - 10.1103/PhysRevResearch.3.043079
M3 - Article
SN - 2643-1564
VL - 3
JO - Physical Review Research
JF - Physical Review Research
IS - 4
M1 - A77
ER -