Polarization and entanglement of photon-added coherent states

Nogueira, Kátia Maria Lima; Silva, J. B. R.; Gonçalves, J.R.; Vasconcelos, H. M.

doi:10.1103/physreva.87.043821

Cited by 12 publications

(5 citation statements)

References 26 publications

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“…The single photon-added coherent state has been realized experimentally [48]. Based on the Agarawal idea, many novel schemes have been proposed to create various new quantum photon-added states such as photon-added squeezed coherent states [49], photon-added thermal states [50], and entangled photon-added coherent states [51][52][53].…”

Section: Photon-added Coherent Statesmentioning

confidence: 99%

Efficient non-Gaussianity measure for single-mode fields by kurtosis of a Gaussian operator

2019

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We propose a method to faithfully probe and quantify the non-Gaussianity of single-mode fields in the coherent-state representations based on the averaged-cumulant technique. In comparison with the previous measure, S H Xiang et al (2018 Phys. Rev. A 97 042303), we characterize the non-Gaussianity of quantum states using the kurtosis of a Gaussian operator, rather than that of a quadrature operator. As applications, we investigate the non-Gaussianities of three different non-Gaussian states: a mixture of vacuum and Fock states, Schrödinger cat states, and photon-added coherent states. It is proven that such a kurtosis is a powerful and effective measure in appraising non-Gaussianity.

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Section: Photon-added Coherent Statesmentioning

confidence: 99%

Efficient non-Gaussianity measure for single-mode fields by kurtosis of a Gaussian operator

2019

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“…A different alternative is found with hybrid entangled resources, where the maximally entangled state between two subsystems is formed by a superposition of CV and DV domains. For such hybrid entangled state (HES), a projective measure in the discrete or continuous basis on a subsystem will project the another one to the opposite DV-CV domain [17,18].…”

Section: Introductionmentioning

confidence: 99%

Quantum teleportation with hybrid entangled resources prepared from heralded quantum states

2020

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In this work we propose the generation of a hybrid entangled resource (HER) and its further application in a quantum teleportation scheme from an experimentally feasible point of view. The source for HER preparation is based on the four wave mixing process in a photonic crystal fiber, from which one party of its output bipartite state is used to herald a single photon or a single photon added coherent state. From the heralded state and linear optics the HER is created. In the proposed teleportation protocol Bob uses the HER to teleport qubits with different spectral properties. Bob makes a Bell measurement in the single photon basis and characterizes the scheme with its average quantum teleportation fidelity. Fidelities close to one are expected for qubits in a wide spectral range. The work also includes a discussion about the fidelity dependence on the geometrical properties of the medium through which the HER is generated. An important remark is that no spectral filtering is employed in the heralding process, which emphasizes the feasibility of this scheme without compromising photon flux.

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“…An investigation of the entanglement and polarization was done for photonadded coherent states in Ref. [23]. The task of this paper is to make a comparison between the entanglement, using the concurrence, and polarization based on the quantum Chernoff bound of two-mode three-photon states, which are diagonal in the Bell-type basis.…”

Section: Introductionmentioning

confidence: 99%

Entanglement versus quantum degree of polarization

Ghiu¹

2018

Preprint

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In this article we make a comparison between the behavior of entanglement and quantum degree of polarization for a special class of states of the radiation field, namely the Bell-type diagonal mixed states. For the three-photon mixed states we have plotted the concurrence and the Chernoff quantum degree of polarization in terms of the parameter, which defines the state. We find the the entanglement and the quantum degree of polarization are incomparable measures.

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Polarization and entanglement of photon-added coherent states

Cited by 12 publications

References 26 publications

Efficient non-Gaussianity measure for single-mode fields by kurtosis of a Gaussian operator

Efficient non-Gaussianity measure for single-mode fields by kurtosis of a Gaussian operator

Quantum teleportation with hybrid entangled resources prepared from heralded quantum states

Entanglement versus quantum degree of polarization

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