|
This article is cited in 10 scientific papers (total in 10 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.
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
Linking options:
https://www.mathnet.ru/eng/tmf9377https://doi.org/10.4213/tmf9377 https://www.mathnet.ru/eng/tmf/v195/i1/p155
|
Statistics & downloads: |
Abstract page: | 346 | Full-text PDF : | 68 | References: | 46 | First page: | 19 |
|