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...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/97680 http://hdl.handle.net/10220/19601 |
| _version_ | 1811691353302630400 |
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| author | Yao, Yao Chernyak, Vladimir Zhao, Yang Zhao, Yang |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Yao, Yao Chernyak, Vladimir Zhao, Yang Zhao, Yang |
| author_sort | Yao, Yao |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T06:18:32Z |
| format | Journal Article |
| id | ntu-10356/97680 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:18:32Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| 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_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_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_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 |
| topic | DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/97680 http://hdl.handle.net/10220/19601 |
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