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Measuring Quantum Optomechanical Self-induced Oscillations: Photon Correlation and Homodyne Tomography

Jiang Qian, Florian Marquardt, Aashish A. Clerk +1 more

APSFeb 1, 20120 citations

Quantum state tomography

Muhammad Hamza Waseem, Faizan-e-Ilahi, Muhammad Sabieh Anwar

Institute of Physics eBooksJul 1, 20203 citations

Tomography of an optomechanical oscillator via parametrically amplified position measurement

P Warszawski, Alex Szorkovszky, Warwick P. Bowen +1 more

We propose a protocol for quantum state tomography of nonclassical states in optomechanical systems. Using a parametric drive, the procedure overcomes the challenges of weak optomechanical coupling, poor detection efficiency, and thermal noise to enable high efficiency homodyne measurement. Our analysis is based on the analytic description of the generalized measurement that is performed when optomechanical position measurement competes with thermal noise and a parametric drive. The proposed experimental procedure is numerically simulated in realistic parameter regimes, which allows us to show that tomographic reconstruction of otherwise unverifiable nonclassical states is made possible.We propose a protocol for quantum state tomography of nonclassical states in optomechanical systems. Using a parametric drive, the procedure overcomes the challenges of weak optomechanical coupling, poor detection efficiency, and thermal noise to enable high efficiency homodyne measurement. Our analysis is based on the analytic description of the generalized measurement that is performed when optomechanical position measurement competes with thermal noise and a parametric drive. The proposed experimental procedure is numerically simulated in realistic parameter regimes, which allows us to show that tomographic reconstruction of otherwise unverifiable nonclassical states is made possible.

arXiv:1811.08444New Journal of PhysicsFeb 4, 20193 citations

Optomechanical entanglement: How to prepare, verify and "steer" a macroscopic mechanical quantum state?

S. L. Danilishin, Haixing Miao, M Helge +1 more

We consider a generic optomechanical system and investigate quantum entanglement between the outgoing light fields and the mechanical motion of the mirror. In contract to traditional approach, we do not consider quantum correlations between the intracavity optical mode and the mechanical motion of a mirror, rather the correlations between the continuum of optical fields in the outgoing light wave and the mechanical degree of freedom. This entanglement is shown to be robust to thermal decoherence and depend on the ratio of measurement strength (light power) and decoherence rate ∝ T/Qm. Furthermore, we describe a feasible way to demonstrate quantum state steering, usinging time-variable homodyne detection scheme that allows to evade back-action. An intimate connection between optomechanical steerability and quantum state tomography [Phys. Rev. A 81, 012114 (2010)] is demonstrated.We consider a generic optomechanical system and investigate quantum entanglement between the outgoing light fields and the mechanical motion of the mirror. In contract to traditional approach, we do not consider quantum correlations between the intracavity optical mode and the mechanical motion of a mirror, rather the correlations between the continuum of optical fields in the outgoing light wave and the mechanical degree of freedom. This entanglement is shown to be robust to thermal decoherence and depend on the ratio of measurement strength (light power) and decoherence rate ∝ T/Qm. Furthermore, we describe a feasible way to demonstrate quantum state steering, usinging time-variable homodyne detection scheme that allows to evade back-action. An intimate connection between optomechanical steerability and quantum state tomography [Phys. Rev. A 81, 012114 (2010)] is demonstrated.

Jan 1, 20133 citations

Optomechanics for quantum technologies

Shabir Barzanjeh, André Xuereb, Simon Gröblacher +3 more

arXiv:2111.14715Nature PhysicsDec 6, 20211 citation

Quantum state tomography of a mechanical oscillator

Robert Delaney, Adam Reed, Reed C. Andrews +1 more

Bulletin of the American Physical SocietyMar 6, 20191 citation

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