Entanglement dynamics of two qubits coupled individually to Ohmic baths

Developed originally for the Holstein polaron, the Davydov D1 ansatz is an efficient, yet extremely accurate trial state for time-dependent variation of the spin-boson model [N. Wu, L. Duan, X. Li, and Y. Zhao, J. Chem. Phys. 138, 084111 (2013)]10.1063/1.4792502. In this work, the Dirac-Frenkel time...

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Main Authors: Duan, Liwei, Wang, Hui, Chen, Qing-Hu, Zhao, Yang
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/98152
http://hdl.handle.net/10220/13325
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-981522023-07-14T15:54:29Z Entanglement dynamics of two qubits coupled individually to Ohmic baths Duan, Liwei Wang, Hui Chen, Qing-Hu Zhao, Yang School of Materials Science & Engineering Developed originally for the Holstein polaron, the Davydov D1 ansatz is an efficient, yet extremely accurate trial state for time-dependent variation of the spin-boson model [N. Wu, L. Duan, X. Li, and Y. Zhao, J. Chem. Phys. 138, 084111 (2013)]10.1063/1.4792502. In this work, the Dirac-Frenkel time-dependent variational procedure utilizing the Davydov D1 ansatz is implemented to study entanglement dynamics of two qubits under the influence of two independent baths. The Ohmic spectral density is used without the Born-Markov approximation or the rotating-wave approximation. In the strong coupling regime finite-time disentanglement is always found to exist, while at the intermediate coupling regime, the entanglement dynamics calculated by Davydov D1 ansatz displays oscillatory behavior in addition to entanglement disappearance and revival. Published version 2013-09-04T08:40:00Z 2019-12-06T19:51:30Z 2013-09-04T08:40:00Z 2019-12-06T19:51:30Z 2013 2013 Journal Article Duan, L., Wang, H., Chen, Q. H.,& Zhao, Y. (2013). Entanglement dynamics of two qubits coupled individually to Ohmic baths. The Journal of Chemical Physics, 139(4), 044115. 0021-9606 https://hdl.handle.net/10356/98152 http://hdl.handle.net/10220/13325 10.1063/1.4816122 en The journal of chemical physics © 2013 AIP Publishing LLC. This paper was published in The Journal of Chemical Physics and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4816122].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
description Developed originally for the Holstein polaron, the Davydov D1 ansatz is an efficient, yet extremely accurate trial state for time-dependent variation of the spin-boson model [N. Wu, L. Duan, X. Li, and Y. Zhao, J. Chem. Phys. 138, 084111 (2013)]10.1063/1.4792502. In this work, the Dirac-Frenkel time-dependent variational procedure utilizing the Davydov D1 ansatz is implemented to study entanglement dynamics of two qubits under the influence of two independent baths. The Ohmic spectral density is used without the Born-Markov approximation or the rotating-wave approximation. In the strong coupling regime finite-time disentanglement is always found to exist, while at the intermediate coupling regime, the entanglement dynamics calculated by Davydov D1 ansatz displays oscillatory behavior in addition to entanglement disappearance and revival.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Duan, Liwei
Wang, Hui
Chen, Qing-Hu
Zhao, Yang
format Article
author Duan, Liwei
Wang, Hui
Chen, Qing-Hu
Zhao, Yang
spellingShingle Duan, Liwei
Wang, Hui
Chen, Qing-Hu
Zhao, Yang
Entanglement dynamics of two qubits coupled individually to Ohmic baths
author_sort Duan, Liwei
title Entanglement dynamics of two qubits coupled individually to Ohmic baths
title_short Entanglement dynamics of two qubits coupled individually to Ohmic baths
title_full Entanglement dynamics of two qubits coupled individually to Ohmic baths
title_fullStr Entanglement dynamics of two qubits coupled individually to Ohmic baths
title_full_unstemmed Entanglement dynamics of two qubits coupled individually to Ohmic baths
title_sort entanglement dynamics of two qubits coupled individually to ohmic baths
publishDate 2013
url https://hdl.handle.net/10356/98152
http://hdl.handle.net/10220/13325
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