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Influences of spin-orbit interaction on quantum speed limit and entanglement of spin qubits in coupled quantum dots |
| M Bagheri Harouni† |
| Quantum Optics Group, Department of Physics, University of Isfahan, Hezar Jerib St., Isfahan 81764-73441, Iran |
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Abstract Quantum speed limit and entanglement of a two-spin Heisenberg XYZ system in an inhomogeneous external magnetic field are investigated. The physical system studied is the excess electron spin in two adjacent quantum dots. The influences of magnetic field inhomogeneity as well as spin-orbit coupling are studied. Moreover, the spin interaction with surrounding magnetic environment is investigated as a non-Markovian process. The spin-orbit interaction provides two important features: the formation of entanglement when two qubits are initially in a separated state and the degradation and rebirth of the entanglement.
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Received: 07 October 2020
Revised: 08 February 2021
Accepted manuscript online: 16 March 2021
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PACS:
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03.67.-a
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(Quantum information)
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03.67.Bg
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(Entanglement production and manipulation)
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75.70.Tj
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(Spin-orbit effects)
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Corresponding Authors:
M Bagheri Harouni
E-mail: m-bagheri@phys.ui.ac.ir
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Cite this article:
M Bagheri Harouni Influences of spin-orbit interaction on quantum speed limit and entanglement of spin qubits in coupled quantum dots 2021 Chin. Phys. B 30 090301
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