Influences of spin-orbit interaction on quantum speed limit and entanglement of spin qubits in coupled quantum dots

doi:10.1088/1674-1056/abeef4

中国物理B ›› 2021, Vol. 30 ›› Issue (9): 90301-090301.doi: 10.1088/1674-1056/abeef4

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

收稿日期:2020-10-07 修回日期:2021-02-08 接受日期:2021-03-16 出版日期:2021-08-19 发布日期:2021-08-19
通讯作者: M Bagheri Harouni E-mail:m-bagheri@phys.ui.ac.ir

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

Received:2020-10-07 Revised:2021-02-08 Accepted:2021-03-16 Online:2021-08-19 Published:2021-08-19
Contact: M Bagheri Harouni E-mail:m-bagheri@phys.ui.ac.ir

摘要/Abstract

摘要： 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.

关键词: quantum speed limit time, quantum entanglement, open quantum systems, spin-orbit effects

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.

Key words: quantum speed limit time, quantum entanglement, open quantum systems, spin-orbit effects

中图分类号: (Quantum information)

03.67.-a

03.67.Bg (Entanglement production and manipulation) 75.70.Tj (Spin-orbit effects)

M Bagheri Harouni. Influences of spin-orbit interaction on quantum speed limit and entanglement of spin qubits in coupled quantum dots[J]. 中国物理B, 2021, 30(9): 90301-090301.

M Bagheri Harouni. Influences of spin-orbit interaction on quantum speed limit and entanglement of spin qubits in coupled quantum dots[J]. Chin. Phys. B, 2021, 30(9): 90301-090301.

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Influences of spin-orbit interaction on quantum speed limit and entanglement of spin qubits in coupled quantum dots

Influences of spin-orbit interaction on quantum speed limit and entanglement of spin qubits in coupled quantum dots

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