Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime

We investigate a spin-boson model with two boson baths that are coupled to two perpendicular components of the spin by employing the density matrix renormalization group method with an optimized boson basis. It is revealed that in the deep sub-Ohmic regime there exists a novel second-order phase tra...

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Main Authors:	Yao, Yao, Chernyak, Vladimir, Zhao, Yang
Other Authors:	School of Materials Science & Engineering
Format:	Article
Language:	English
Published:	2014
Subjects:	DRNTU::Science::Physics
Online Access:	https://hdl.handle.net/10356/97680 http://hdl.handle.net/10220/19601
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Institution:	Nanyang Technological University
Language:	English

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spelling	sg-ntu-dr.10356-976802023-07-14T15:51:03Z Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime Yao, Yao Chernyak, Vladimir Zhao, Yang Zhao, Yang School of Materials Science & Engineering DRNTU::Science::Physics We investigate a spin-boson model with two boson baths that are coupled to two perpendicular components of the spin by employing the density matrix renormalization group method with an optimized boson basis. It is revealed that in the deep sub-Ohmic regime there exists a novel second-order phase transition between two types of doubly degenerate states, which is reduced to one of the usual types for nonzero tunneling. In addition, it is found that expectation values of the spin components display jumps at the phase boundary in the absence of bias and tunneling. Published version 2014-06-10T02:40:17Z 2019-12-06T19:45:23Z 2014-06-10T02:40:17Z 2019-12-06T19:45:23Z 2014 2014 Journal Article Zhao, Y., Yao, Y., Chernyak, V., & Zhao, Y. (2014). Communication: Spin-boson model with diagonal and off-diagonal coupling to two independent baths: Ground-state phase transition in the deep sub-Ohmic regime. The Journal of Chemical Physics, 140(16), 161105-. 0021-9606 https://hdl.handle.net/10356/97680 http://hdl.handle.net/10220/19601 10.1063/1.4873351 en The journal of chemical physics © 2014 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/10.1063/1.4873351. 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
topic	DRNTU::Science::Physics
spellingShingle	DRNTU::Science::Physics Yao, Yao Chernyak, Vladimir Zhao, Yang Zhao, Yang Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime
description	We investigate a spin-boson model with two boson baths that are coupled to two perpendicular components of the spin by employing the density matrix renormalization group method with an optimized boson basis. It is revealed that in the deep sub-Ohmic regime there exists a novel second-order phase transition between two types of doubly degenerate states, which is reduced to one of the usual types for nonzero tunneling. In addition, it is found that expectation values of the spin components display jumps at the phase boundary in the absence of bias and tunneling.
author2	School of Materials Science & Engineering
author_facet	School of Materials Science & Engineering Yao, Yao Chernyak, Vladimir Zhao, Yang Zhao, Yang
format	Article
author	Yao, Yao Chernyak, Vladimir Zhao, Yang Zhao, Yang
author_sort	Yao, Yao
title	Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime
title_short	Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime
title_full	Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime
title_fullStr	Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime
title_full_unstemmed	Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime
title_sort	communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-ohmic regime
publishDate	2014
url	https://hdl.handle.net/10356/97680 http://hdl.handle.net/10220/19601
_version_	1772827572684455936

Communication : spin-boson model with diagonal and off-diagonal coupling to two independent baths : ground-state phase transition in the deep sub-Ohmic regime

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