D-Concurrence Bounds for Pair Coherent States

Salimi, S.; Mohammadzade, A.

doi:10.1007/s10773-010-0653-2

Cited by 8 publications

(6 citation statements)

References 58 publications

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“…Moreover, the schemes for generating this state were proposed [6,[36][37][38]. The pair coherent state is an entangled state, and the quantitative measures of entanglement, quantum teleportation, and quantum key distribution by using this state were also studied [39][40][41][42][43]. The photon addition to two modes of pair coherent state as photon-added pair coherent state [44] and generalized photon-added pair coherent state [45] were introduced.…”

Section: Introductionmentioning

confidence: 99%

Detecting nonclassicality and non-Gaussianity by the Wigner function and quantum teleportation in photon-added-and-subtracted two modes pair coherent state

Đức

Tran

2021

J Comput Electron

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We introduce a new state called photon-added-and-subtracted two modes pair coherent state (PAASTMPCS) by simultaneously adding and subtracting photons to the different modes of a pair coherent state. Its nonclassical and non-Gaussian properties are strengthened via the negative values of its Wigner function as the numbers of adding and subtracting photons are increased. It indicates that the PAASTMPCS is an entangled state. When increasing the numbers of photon-added and photon-subtracted to a pair coherent state, the degree of entanglement in the PAASTMPCS is enhanced compared with the original pair coherent state. By using a PAASTM-PCS as a non-Gaussian entangled resource, the quantum teleportation processes are studied in detail. It is shown that the number sum and phase difference measurements protocol is more appropriate than the orthogonal quadrature components measurements protocol in the quantum teleportation process of a coherent state.

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Section: Introductionmentioning

confidence: 99%

Detecting nonclassicality and non-Gaussianity by the Wigner function and quantum teleportation in photon-added-and-subtracted two modes pair coherent state

Đức

Tran

2021

J Comput Electron

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“…The other scheme for preparation of superposition of coherent states in cavity QED was studied in [22,23] in which an atom either flying through or trapped within a cavity, is controlled by the classical Stark effect. ECS's have many applications in quantum optics and quantum information processing [24,25,26,27,28,29,30,31,32,33]. In [34,35] the required conditions for the maximal entangled states of the form |ψ = µ|α |β + ν|γ |δ have been studied and then have been generalized to the state |ψ = µ|α |β + λ|α |δ + ρ|γ |β + ν|γ |δ in Ref.…”

Section: Introductionmentioning

confidence: 99%

One-Mode Wigner Quasi-probability Distribution Function for Entangled Coherent States Generated by Beam Splitter and Cavity QED

Najarbashi¹,

Mirzaei²

2016

Preprint

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In this paper, we use the displacement operator together with parity operation to construct the superposition of two coherent states. By transmitting this superposition from 50-50 beam splitter the two-mode qubit like ECS is generated. Moreover, we introduce a controllable method for producing qutrit like ECS using atom-field interaction in cavity QED and beam splitter. We will show that the distances of peaks of Wigner functions for reduced density matrices of two-mode ECS's are entanglement sensitive and can be a witness for entanglement. To confirm the results we use concurrence measure to compare

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“…Coherent states, originally introduced by Schrodinger in 1926 [25]. However, multi-mode quantum states of radiation fields which present the opportunity to be a resource in quantum information theory have been the subject of considerable interest in the experimental and theoretical literature [26,27,28,29,30,31,32,33,34,35,36,37,38,39,40]. Entanglement concentration for W-type entangled coherent states have been investigated in Ref.…”

Section: Introductionmentioning

confidence: 99%

Comparison of qubit and qutrit like entangled squeezed and coherent states of light

Najarbashi

Mirzaei

2016

Optics Communications

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Squeezed state of light is one of the important subjects in quantum optics which is generated by optical nonlinear interactions. In this paper, we especially focus on qubit like entangled squeezed states (ESS's) generated by beam splitters, phase-shifter and cross Kerr nonlinearity. Moreover the Wigner function of two-mode qubit and qutrit like ESS are investigated. We will show that the distances of peaks of Wigner functions for two-mode ESS are entanglement sensitive and can be a witness for entanglement. Like the qubit cases, monogamy inequality is fulfilled for qutrit like ESS. These trends are compared with those obtained for qubit and qutrit like entangled coherent states (ECS).

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D-Concurrence Bounds for Pair Coherent States

Abstract: The pair coherent state is a state of a two-mode radiation field which is known as a state with non-Gaussian wave function. In this paper, the upper and lower bounds for D-concurrence (a new entanglement measure) have been studied over this state and calculated.

Cited by 8 publications

References 58 publications

Detecting nonclassicality and non-Gaussianity by the Wigner function and quantum teleportation in photon-added-and-subtracted two modes pair coherent state

Detecting nonclassicality and non-Gaussianity by the Wigner function and quantum teleportation in photon-added-and-subtracted two modes pair coherent state

One-Mode Wigner Quasi-probability Distribution Function for Entangled Coherent States Generated by Beam Splitter and Cavity QED

Comparison of qubit and qutrit like entangled squeezed and coherent states of light

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