| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Quantum speed limit time and entanglement in a non-Markovian evolution of spin qubits of coupled quantum dots |
| M. Bagheri Harouni1,2,† |
| 1 Department of Physics, University of Isfahan, Hezar Jerib St., Isfahan 81764-73441, Iran; 2 Department of Physics, Quantum Optics Group, University of Isfahan, Hezar Jerib St., Isfahan 81764-73441, Iran |
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Abstract Quantum speed limit time and entanglement in a system composed of coupled quantum dots are investigated. The excess electron spin in each quantum dot constitutes the physical system (qubit). Also the spin interaction is modeled through the Heisenberg model and the spins are imposed by an external magnetic field. Taking into account the spin relaxation as a non-Markovian process, the quantum speed limit and entanglement evolution are discussed. Our findings reveal that increasing the magnetic field leads to the faster quantum evolution. In addition, the temperature increment causes the longer quantum speed limit time as well as the entanglement degradation.
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Received: 22 April 2020
Revised: 28 June 2020
Accepted manuscript online: 01 August 2020
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PACS:
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42.50.Dv
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(Quantum state engineering and measurements)
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11.10.Nx
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(Noncommutative field theory)
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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Corresponding Authors:
†Corresponding author. E-mail: m-bagheri@phys.ui.ac.ir
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Cite this article:
M. Bagheri Harouni Quantum speed limit time and entanglement in a non-Markovian evolution of spin qubits of coupled quantum dots 2020 Chin. Phys. B 29 124203
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