Optomechanical generation of a mechanical catlike state by phonon subtraction

Shomroni, Itay; Qiu, Liu; Kippenberg, Tobias J.

doi:10.1103/physreva.101.033812

Cited by 23 publications

(11 citation statements)

References 80 publications

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“…However, non-classical states are notoriously difficult to generate in macroscopic systems due to the lack of long enough coherence lengths. Considerable advances on this front have been obtained in optomechanical systems (in which light couples to acoustic excitations [16]) [17][18][19][20], however cat states have not yet been realized in this platform [21,22].…”

Section: Introductionmentioning

confidence: 99%

Spin cat states in a ferromagnetic insulator

Sharma,

Bittencourt,

Karenowska

et al. 2020

Preprint

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Generating non-classical states in macroscopic systems is a long standing challenge. A promising platform in the context of this quest are novel hybrid systems based on magnetic dielectrics, where photons can couple strongly and coherently to magnetic excitations, although a non-classical state therein is yet to be observed. We propose a scheme to generate a magnetization cat state, i.e. a quantum superposition of two distinct magnetization directions, using a conventional setup of a macroscopic ferromagnet in a microwave cavity. Our scheme uses the ground state of an ellipsoid shaped magnet, which displays anisotropic quantum fluctuations akin to a squeezed vacuum. The magnetization collapses to a cat state by either a single-photon or a parity measurement of the microwave cavity state. We find that a cat state with two components separated by ∼ 5 is feasible and briefly discuss potential experimental setups that can achieve it.

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Section: Introductionmentioning

confidence: 99%

Spin cat states in a ferromagnetic insulator

Sharma,

Bittencourt,

Karenowska

et al. 2020

Preprint

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“…The technique of preparing mechanical oscillator in pure states close to zero-point vibration is fundamentally important [1][2][3][4]. By suppressing the effects of stochastic driving from the thermal environment, mechanical ground-state cooling provides a critical avenue for exploring a wide range of quantum-mechanical phenomenon, including the boundary between quantum and classical mechanics [5], macroscopic quantum behavior [6,7]. It can also be used to attain measurement precision in quantum metrology that is close to the standard quantum limit [8][9][10], as exemplified by the gravitational wave detection [11].…”

Section: Introductionmentioning

confidence: 99%

Optimized sideband cooling with initial system correlations in non-Markovian regime

Zhang,

Tan,

Zhao

et al. 2020

Preprint

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An optimized sideband cooling in the presence of initial system correlations is investigated for a standard optomechanical system coupled to a general mechanical non-Markovian reservoir. We study the evolution of phonon number by incorporating the effects of initial correlations into the time-dependent coefficients in the Heisenberg equation. We introduce the concept of cooling rate and define an average phonon reduction function to describe the sideband cooling effect in non-Markovian regime. Our results show that the instantaneous phonon number can be significantly reduced by introducing either the parametric-amplification type or the beam-splitter type initial correlations. In addition, the ground state cooling rate can be accelerated by enhancing the initial correlation of beam-splitter type. By optimizing the initial state of the system and utilizing Qmodulation technology, a stable mechanical ground state can be obtained in a very short time. Our optimized cooling protocol provides an appealing platform for phonon manipulation and quantum information processing in solid-state systems.

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“…Cavity optomechanical system [1][2][3][4][5][6] is an artificial microstructure that combines the interaction between the mechanical mode and the optical mode with various effect could be observed on it. For example, the optomechanical induced transparency [7][8][9][10][11][12][13][14][15][16], optomechanical assisted nonlinearity [17][18][19][20][21][22][23][24][25][26], phonon lasers [27][28][29][30][31][32], in the semi-classical region; the photon blockade [33][34][35][36][37][38][39], mechanical resonator cooling [40][41][42][43][44][45], nonclassical state preparation [46][47][48]…”

Section: Introductionmentioning

confidence: 99%

Hybrid coupling optomechanically assisted nonreciprocal photon blockade

Gao,

Wang

2020

Preprint

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The properties of open quantum system in quantum information science is now extensively investigated more generally by the research community as a fundamental issue for a variety of applications. Usually, the states of the open quantum system might be disturbed by the decoherence which will reduce the fidelity in the quantum information processing. So it is better to eliminate the influence of the environment. However, as part of the composite system, rational use of the environment system could be beneficial to quantum information processing. Here we theoretically studied the environment induced quantum nonlinearity and energy spectrum tuning method in the optomechanical system. And we found that the dissipation coupling of the hybrid dissipation and dispersion optomechanical system can induce the coupling between the environment and system in the cross-Kerr interaction form. When the symmetry is broken with a directional pumping environment, the system exhibits the non-reciprocal behavior during the photon excitation and photon blockade for the clockwise and counterclockwise modes of the whispering-gallery mode microcavity. Furthermore, we believe that the cross-Kerr coupling can also be used in a more widely region in quantum information processing and quantum simulation.

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Optomechanical generation of a mechanical catlike state by phonon subtraction

Cited by 23 publications

References 80 publications

Spin cat states in a ferromagnetic insulator

Spin cat states in a ferromagnetic insulator

Optimized sideband cooling with initial system correlations in non-Markovian regime

Hybrid coupling optomechanically assisted nonreciprocal photon blockade

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