Quantifying quantum correlation of quasi-Werner state and probing its
suitability for quantum teleportation
- URL: http://arxiv.org/abs/2011.14703v1
- Date: Mon, 30 Nov 2020 11:30:31 GMT
- Title: Quantifying quantum correlation of quasi-Werner state and probing its
suitability for quantum teleportation
- Authors: Arpita Chatterjee, Kishore Thapliyal and Anirban Pathak
- Abstract summary: We analyze the behavior of the Wigner function of two quasi-Werner states theoretically constructed by superposing two normalized bipartite $m$-photon added coherent states.
We show that the performance of the quasi-Werner states as quantum channel for the teleportation of a single-mode coherent and squeezed states, as quantified via teleportation fidelity, improves with the photon addition.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The significance of photon addition in engineering the single- and two-mode
(bipartite correlations) nonclassical properties of a quantum state is
investigated. Specifically, we analyzed the behavior of the Wigner function of
two quasi-Werner states theoretically constructed by superposing two normalized
bipartite $m$-photon added coherent states. This allowed us to quantify the
amount of nonclassicality present in the quantum states using Wigner
logarithmic negativity (WLN), while quantum correlations are measured in terms
of concurrence, entanglement of formation, and quantum discord. The WLN for a
two-mode state corresponds to the sum of the single-mode nonclassicality as
well as quantum correlations, and both of these are observed to enhance with
photon addition manifesting the efficacy of photon addition in the entanglement
distillation. Usefulness of photon addition is further established by showing
that the performance of the quasi-Werner states as quantum channel for the
teleportation of a single-mode coherent and squeezed states, as quantified via
teleportation fidelity, improves with the photon addition. Further, in contrast
to a set of existing results, it is established that the negative values of
two-mode Wigner function cannot be used in general as a witness of quantum
correlation.
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