Atom–photon, two-mode entanglement and two-mode squeezing in the presence of cross-Kerr nonlinearity

Mortezapour, Ali; Mahmoudi, Mohammad; Khajehpour, M. R. H.

doi:10.1007/s11082-014-0109-7

Cited by 7 publications

(3 citation statements)

References 60 publications

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“…Contrary to this, further increment of this parameter is restricted by the steadystate condition given in (52). It is worthwhile to stress that the degree of entanglement and squeezing predicted here is by far more improved than the results obtained in the previous works [4,6,30], and a small value of the linear gain coefficient can be used to produce a robust entangled light. Moreover, in the absence of the parametric amplifier, no squeezing and entanglement are demonstrated for the atoms initially prepared in the bottom level [6] while very weak entangled and squeezed light could be detected in the presence of the parametric amplifier [30].…”

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confidence: 44%

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Enhanced CV Entanglement Quantification in a CEL with Parametric Amplifier and Coupled to Squeezed Vacuum

Feyisa

2020

Braz J Phys

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Externally induced entanglement amplification in a coherently pumped correlated emission laser (CEL) with parametric amplifier and coupled to a two-mode squeezed vacuum reservoir is presented. The combination of the master equation and stochastic differential equation is employed to investigate the entanglement of the two-mode light generated by the quantum system. The resulting solutions of the correlation properties of noise forces associated with the normal ordering are used to find the mean photon number of the cross-correlated mode and separate cavity modes, quadrature fluctuations, smallest eigenvalue of the symplectic matrix, and photon number correlation function. It is found that pumping atoms from the lower energy state to excited state results in a robust entanglement that remains in its maximum strength over a wide range of the strong classical driving radiation. The introduction of the nonlinear crystal into the linear cavity, and coupling the system to the two-mode squeezed vacuum environment lead to a significant enhancement of entanglement of the cavity light. The enhanced entanglement is quantified employing logarithmic negativity, Cauchy-Schwarz inequality, and Duan et al. criteria. It has been observed that an intense light can be produced where the entanglement is strong.

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confidence: 44%

“…Ξ type three-level laser has been an interesting area of research over the years in light of its capability to produce radiations with various quantum properties [1][2][3][4][5][6][7]. Quantum properties of the light in this optical device resulting from the atomic coherence induced between the dipole forbidden transition.…”

Section: Introductionmentioning

confidence: 99%

Enhanced CV Entanglement Quantification in a CEL with Parametric Amplifier and Coupled to Squeezed Vacuum

Feyisa

2020

Braz J Phys

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“…The interaction of multi-level radiators with a two-mode cavity field was in the focus of the attention of many experimental and theoretical [1][2][3][4][5][6][7]. This investigation is connected with the application of the multi-level system as q-bits in quantum computing and quantum processing of information [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Quantum reversibility in cooperative interaction of the atom system with bi-modal cavity field in Raman conversion

Starodub¹,

Enaki²

2020

Phys. Scr.

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The restoration of the initial state in the Raman interaction of the two atoms with the quantified pump and Stokes (anti-Stokes) cavity modes is analytically obtained. For this the su (2) symmetry representation of the bimodal field and a system of two atoms in scattering interaction is proposed for the simplification of the problem. Using the proprieties of the generators su (2) algebra the exact non-stationary solution of the system of two atoms in interaction with the bimodal field is found, taking into consideration the initial disentangled state between the atomic and field superposition. It is demonstrated that after this collapse and revivals of the inversion of flying atoms in the processes of absorption and emission of the photons from Stokes and pump modes the system atoms and field becomes entangled. The conditions of the restoration of the initial state of the atom-field system were established as a function of the flying time through the resonator possible. A set of discrete flying time intervals for the restoration of the initial disentangled state was found.

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Dynamics of entropy and quantum statistical properties of the field in the interaction of a single two-level atom with a superposition of nonlinear coherent states in the framework of f-deformed Jaynes–Cummings model

Abbasi

Jafari

2016

Opt Quant Electron

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Atom–photon, two-mode entanglement and two-mode squeezing in the presence of cross-Kerr nonlinearity

Cited by 7 publications

References 60 publications

Enhanced CV Entanglement Quantification in a CEL with Parametric Amplifier and Coupled to Squeezed Vacuum

Enhanced CV Entanglement Quantification in a CEL with Parametric Amplifier and Coupled to Squeezed Vacuum

Quantum reversibility in cooperative interaction of the atom system with bi-modal cavity field in Raman conversion

Dynamics of entropy and quantum statistical properties of the field in the interaction of a single two-level atom with a superposition of nonlinear coherent states in the framework of f-deformed Jaynes–Cummings model

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