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TMF, 2018, Volume 195, Number 1, Pages 155–168 (Mi tmf9377)  

This article is cited in 3 scientific papers (total in 3 papers)

Thermal quantum discord and super quantum discord teleportation via a two-qubit spin-squeezing model

S. Ahadpour, F. Mirmasoudi

Department of Physics, University of Mohaghegh Ardabili, Ardabil, Iran

Abstract: We study thermal quantum correlations (quantum discord and super quantum discord) in a two-spin model in an external magnetic field and obtain relations between them and entanglement. We study their dependence on the magnetic field, the strength of the spin squeezing, and the temperature in detail. One interesting result is that when the entanglement suddenly disappears, quantum correlations still survive. We study thermal quantum teleportation in the framework of this model. The main goal is investigating the possibility of increasing the thermal quantum correlations of a teleported state in the presence of a magnetic field, strength of the spin squeezing, and temperature. We note that teleportation of quantum discord and super quantum discord can be realized over a larger temperature range than teleportation of entanglement. Our results show that quantum discord and super quantum discord can be a suitable measure for controlling quantum teleportation with fidelity. Moreover, the presence of entangled states is unnecessary for the exchange of quantum information.

Keywords: quantum discord, super quantum discord, entanglement, teleportation, two-spin model.

DOI: https://doi.org/10.4213/tmf9377

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English version:
Theoretical and Mathematical Physics, 2018, 195:1, 628–639

Bibliographic databases:

Received: 29.03.2017
Revised: 29.05.2017

Citation: S. Ahadpour, F. Mirmasoudi, “Thermal quantum discord and super quantum discord teleportation via a two-qubit spin-squeezing model”, TMF, 195:1 (2018), 155–168; Theoret. and Math. Phys., 195:1 (2018), 628–639

Citation in format AMSBIB
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\by S.~Ahadpour, F.~Mirmasoudi
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\pages 155--168
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\jour Theoret. and Math. Phys.
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\vol 195
\issue 1
\pages 628--639
\crossref{https://doi.org/10.1134/S004057791804013X}
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  • https://doi.org/10.4213/tmf9377
  • http://mi.mathnet.ru/eng/tmf/v195/i1/p155

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    Citing articles on Google Scholar: Russian citations, English citations
    Related articles on Google Scholar: Russian articles, English articles

    This publication is cited in the following articles:
    1. Mirmasoudi F., Ahadpour S., “Dynamics of Super Quantum Discord and Optimal Dense Coding in Quantum Channels”, J. Phys. A-Math. Theor., 51:34 (2018), 345302  crossref  isi
    2. El-Shahat T.M., Ismail M.Kh., “Some Studies of the Interaction Between Two Two-Level Atoms and Su (1,1) Quantum Systems”, Chin. Phys. B, 27:10 (2018), 100201  crossref  isi  scopus
    3. Ismail M.Kh., El-Shahat T.M., “Generation of Entanglement Between Two Three-Level Atoms Interacting With a Time-Dependent Damping Field”, Physica E, 110 (2019), 74–80  crossref  isi  scopus
  • Теоретическая и математическая физика Theoretical and Mathematical Physics
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