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RESEARCH PRODUCT

Backaction-evading measurement of entanglement in optomechanics

Francesco Massel

subject

PhysicsQuantum PhysicsSingle-mode optical fiberPhase (waves)FOS: Physical sciencesQuantum entanglementResonant cavity01 natural sciencesoskillaattorit010305 fluids & plasmasQuadrature (mathematics)optomechanicsentanglement detectionResonatorAmplitudenanorakenteetQuantum mechanics0103 physical scienceskvanttimekaniikka010306 general physicsQuantum Physics (quant-ph)Optomechanics

description

We propose here a fully backaction-evading scheme for the measurement of the entanglement between two nanomechanical resonators. The system, which consists of two mechanical oscillators, coupled to a single mode of an electromagnetic resonant cavity through a radiation-pressure interaction term, is driven by two pump tones and four detection tones. As previously discussed in the literature, the former induce entanglement between the two mechanical oscillators, while we show here that a specific choice of phase and amplitude of the detection tones allows for direct pairwise reconstruction of the collective quadrature fluctuations of the mechanical oscillators belonging to quantum-mechanics-free subspaces, thereby providing direct evidence of the entanglement properties of the two mechanical resonators.

yearjournalcountryeditionlanguage
2019-01-01
10.1103/physreva.100.023824http://arxiv.org/abs/1907.09882