Journal of Research on Many-body Systems

Journal of Research on Many-body Systems

Investigation of quantum discord and local quantum uncertainty in a vertical quantum dot

Document Type : Full length research Paper

Authors
Esfandyar Faizi 1
Hamideh Eftekhari 2
Kosarossadat Mosavitaha 3
1 Department of Physics, Faculty of science, Azarbaijan Shahid Madani University, Tabriz, Iran.
2 Physics Department, Faculty of Science, Azarbaijan Shahid Madani Univesity, Tabriz, Iran
3 Physics department, Faculty of science, Azarbaijan shahid madani university, Tabriz, Iran
10.22055/jrmbs.2021.16571
Abstract
In this paper, we consider quantum correlations (quantum discord and
local quantum uncertainty) in a vertical quantum dot. Their dependencies on the magnetic
field and temperature are presented in detail. It is noticeable that quantum discord
and local quantum uncertainty behavior is similar to a large extent. In addition, the
time evolution of quantum discord and local quantum uncertainty under dephasing and
amplitude damping channels is investigated. It has been found that for some Belldiagonal
states quantum discord is invariant under some decoherence in a finite time
interval [Phys. Rev. Lett. 104, 200401 (2010)]. Also, our results show that quantum
discord is invariant under dephasing channel for a finite time interval in a vertical
quantum dot, while this phenomenon does not occur for local quantum uncertainty
case
Keywords
Quantum correlations
quantum discords
Local quantum uncertainty
Vertical quantum dot
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  • Receive Date 05 October 2019
  • Revise Date 14 November 2020
  • Accept Date 02 November 2020