Sub-Ohmic spin-boson model with off-diagonal coupling : ground state properties

• Main Authors: Shenai, Prathamesh M., Lü, Zhiguo, Duan, Liwei, Li, Xin, Zhao, Yang
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Chemistry::Physical chemistry
• Online Access: https://hdl.handle.net/10356/101367; http://hdl.handle.net/10220/18408
• Institution: Nanyang Technological University

We have carried out analytical and numerical studies of the spin-boson model in the sub-ohmic regime with the influence of both the diagonal and the off-diagonal coupling accounted for, via the Davydov D1 variational ansatz. While a second-order phase transition is known to be exhibited by this mode...