Quantum and classical phases in optomechanics

Armata, Federico; Latmiral, Ludovico; Pikovski, Igor; Vanner, Michael R.; Brukner, Časlav; Kim, M. S.

doi:10.1103/physreva.93.063862

Cited by 19 publications

(33 citation statements)

References 36 publications

(63 reference statements)

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“…An analysis has also recently been published [28] that determined what fraction of a qm can be described classically, thus there is a hierarchy between classical, quantum, and quantum-gravitational predictions.…”

Section: Pulsed Optomechanical Scheme To Probe Gupmentioning

confidence: 99%

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Amplified transduction of Planck-scale effects using quantum optics

et al. 2017

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The unification of quantum mechanics and gravity remains as one of the primary challenges of present-day physics. Quantum-gravity-inspired phenomenological models offer a window to explore potential aspects of quantum gravity including qualitatively new behaviour that can be experimentally tested. One such phenomenological model is the generalized uncertainty principle (GUP), which predicts a modified Heisenberg uncertainty relation and a deformed canonical commutator. It was recently shown that optomechanical systems offer significant promise to put stringent experimental bounds on such models. In this paper, we introduce a scheme to increase the sensitivity of these experiments with an extended sequence of pulsed optomechanical interactions. We also analyze the effects of optical phase noise and optical loss and present a strategy to mitigate such deleterious effects.

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Section: Pulsed Optomechanical Scheme To Probe Gupmentioning

confidence: 99%

“…Therefore, a small coupling strength λ can be compensated by using a large number of loops N to observe the non-classical component of the effect to the light field [28].…”

Section: A Standard Quantum Mechanical Predictionmentioning

confidence: 99%

Amplified transduction of Planck-scale effects using quantum optics

et al. 2017

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“…Massive mechanical oscillators have been intensively investigated in quantum optomechanics [3,8], and optomechanical cavities are regarded as an optimal framework to make clear comparisons between the predictions of classical theory and their quantum counterparts [10][11][12][13][14][15]. Indeed, they were proven to exhibit a large degree of macroscopicity, µ, defined in terms of the robustness of a coherent superposition against decoherence [16].…”

Section: Introductionmentioning

confidence: 99%

Deterministic preparation of highly non-classical macroscopic quantum states

Latmiral

Mintert

2018

npj Quantum Inf

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We present a scheme to deterministically prepare non-classical quantum states of a massive mirror including highly non-Gaussian states exhibiting sizeable negativity of the Wigner function. This is achieved by exploiting the non-linear light-matter interaction in an optomechanical cavity by driving the system with optimally designed frequency patterns. Our scheme reveals to be resilient against mechanical and optical damping, as well as mechanical thermal noise and imperfections in the driving scheme. Our proposal thus opens a promising route for table-top experiments to explore and exploit macroscopic quantum phenomena.

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“…This is a common situation in local quantum estimation theory and can be worked out by subsequent adaptive measurements [41][42][43]. Moreover, since our final goal is to measure the anharmonic parameter via an interferometric scheme (e.g., homodyne and heterodyne detection), we can ensure the closure of the loop also by looking at the visibility of the interference fringes [23,44]. However, we should also remark that this is not the case for the cubic anharmonicity (see Appendix B) that does not alter the mechanical frequency.…”

Section: Estimation Protocolmentioning

confidence: 99%

Probing anharmonicity of a quantum oscillator in an optomechanical cavity

Latmiral¹,

Armata²,

Genoni³

et al. 2016

Phys. Rev. A

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We present a way of measuring with high precision the anharmonicity of a quantum oscillator coupled to an optical field via radiation pressure. Our protocol uses a sequence of pulsed interactions to perform a loop in the phase space of the mechanical oscillator, which is prepared in a thermal state. We show how the optical field acquires a phase depending on the anharmonicity. Remarkably, one only needs small initial cooling of the mechanical motion to probe even small anharmonicities. Finally, by applying tools from quantum estimation theory, we calculate the ultimate bound on the estimation precision posed by quantum mechanics and compare it with the precision obtainable with feasible measurements such as homodyne and heterodyne detection on the cavity field. In particular we demonstrate that homodyne detection is nearly optimal in the limit of a large number of photons of the field and we discuss the estimation precision of small anharmonicities in terms of its signal-to-noise ratio.

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Quantum and classical phases in optomechanics

Cited by 19 publications

References 36 publications

Amplified transduction of Planck-scale effects using quantum optics

Amplified transduction of Planck-scale effects using quantum optics

Deterministic preparation of highly non-classical macroscopic quantum states

Probing anharmonicity of a quantum oscillator in an optomechanical cavity

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