A1 Journal article (refereed)
Backaction-evading measurement of entanglement in optomechanics (2019)

Massel, F. (2019). Backaction-evading measurement of entanglement in optomechanics. Physical Review A, 100(2), Article 023824. https://doi.org/10.1103/PhysRevA.100.023824

JYU authors or editors

Massel, Francesco

Publication details

All authors or editors: Massel, Francesco

Journal or series: Physical Review A

ISSN: 2469-9926

eISSN: 2469-9934

Publication year: 2019

Volume: 100

Issue number: 2

Article number: 023824

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevA.100.023824

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/65282

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1907.09882

Abstract

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.

Keywords: nanostructures; oscillators; quantum mechanics

Free keywords: entanglement detection; optomechanics

Fields of science: