Quantum parameter identification for a chaotic atom ensemble system

Li, Wenlin; Li, Chong; Song, He-Shan

doi:10.1016/j.physleta.2015.06.055

Cited by 11 publications

(4 citation statements)

References 47 publications

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“…The real parts of above eigenvalues are also known as the Lyapunov exponents of this nonlinear dynamical system 37 38 39 . Whether the system is stable or not can be judged by comparing the largest Lyapunov exponent with zero 38 40 . Equation (5) implies that if J > ( κ + γ )/4, the second terms in λ 3,4,5,6 will be pure imaginary numbers.…”

Section: Resultsmentioning

confidence: 99%

Parity-time-symmetry enhanced optomechanically-induced-transparency

Jiang

et al. 2016

Sci Rep

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We propose and analyze a scheme to enhance optomechanically-induced-transparency (OMIT) based on parity-time-symmetric optomechanical system. Our results predict that an OMIT window which does not exist originally can appear in weak optomechanical coupling and driving system via coupling an auxiliary active cavity with optical gain. This phenomenon is quite different from these reported in previous works in which the gain is considered just to damage OMIT phenomenon even leads to electromagnetically induced absorption or inverted-OMIT. Such enhanced OMIT effects are ascribed to the additional gain which can increase photon number in cavity without reducing effective decay. We also discuss the scheme feasibility by analyzing recent experiment parameters. Our work provide a promising platform for the coherent manipulation and slow light operation, which has potential applications for quantum information processing and quantum optical device.

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Section: Resultsmentioning

confidence: 99%

Parity-time-symmetry enhanced optomechanically-induced-transparency

Jiang

et al. 2016

Sci Rep

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“…And the real parts of the eigenvalues are known as the Lyapunov exponents [42], if the maximal Lyapunov exponent is negative, the system is stable. Contrarily, the maximal Lyapunov exponent is positive indicates the system is unstable [43,44].…”

Section: Stability Of Systemmentioning

confidence: 99%

Entanglement enhanced and one-way steering in PT -symmetric cavity magnomechanics

Ding,

2020

Preprint

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We study creation of entanglement and quantum steering in a parity-time-(PT -) symmetric cavity magnomechanical system. There is magnetic dipole interaction between the cavity and photon-magnon, and there is also magnetostrictive interaction which is induced by the phononmagnon coupling in this system. By introducing blue-detuned driving microwave field to the system, the bipartite entanglement of the system with PT -symmetry is significantly enhanced versus the case in the conventional cavity magnomechanical systems (loss-loss systems). Moreover, the one-way quantum steering between magnon-phonon and photon-phonon modes can be obtained in the unbroken-PT -symmetric regime. The boundary of stability is demonstrated and this show that the steady-state solutions are more stable in the gain and loss systems. This work opens up a route to explore the characteristics of quantum entanglement and steering in magnomechanical systems, which might have potential applications in quantum state engineering and quantum information.

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“…The majority of previous works considered such kind of synchronization of only expectation value in quantum system and the quantum fluctuation is neglected or regarded as disturbance in their schemes. 8,[15][16][17] Intuitively, an appropriate application of quantum synchronization is to provide an effective quantum correlation for quantum information processing (QIP). 18 Different from the applications of synchronization in other fields, quantum characteristics play the important role in QIP.…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, quantum synchronization has been paid extensive attention in many physical systems, [7][8][9][10][11][12][13][14] but few works proposed it as a tool in view of applications. Recently, some effective attempts are presented to apply quantum synchronization in signal transmission, 15 parameter identification 16 and atomic clock. 8,17 Owing to Heisenberg uncertainty, 1 however, quantum effect appears to just take place a negative influence on synchronization behavior due to quantum fluctuation.…”

Section: Introductionmentioning

confidence: 99%

Quantum synchronization and quantum state sharing in an irregular complex network

Song

2017

Phys. Rev. E

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We investigate quantum synchronization phenomenon within the complex network constituted by coupled optomechanical systems and prove the unknown identical quantum states can be shared or distributed in the quantum network even though the topology is varying. Considering a channel constructed by quantum correlation, we show that quantum synchronization can sustain and maintain high levels in Markovian dissipation for a long time. We analyze state sharing process between two typical complex networks, that is, a small-world network corresponding to linear motif state sharing and a scale-free network corresponding to whole network sharing, respectively. Our results predict that linked nodes can be directly synchronized in small-world network, but the whole network will be synchronized only if some specific synchronization conditions are satisfied. Furthermore, we give the synchronization conditions analytically through analyzing network dynamics. This proposal paves the way for studying multi-interaction synchronization and achieving an effective quantum information processing in complex network.

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Quantum parameter identification for a chaotic atom ensemble system

Cited by 11 publications

References 47 publications

Parity-time-symmetry enhanced optomechanically-induced-transparency

Parity-time-symmetry enhanced optomechanically-induced-transparency

Entanglement enhanced and one-way steering in PT -symmetric cavity magnomechanics

Quantum synchronization and quantum state sharing in an irregular complex network

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