Zero-temperature localization in a sub-Ohmic spin-boson model investigated by an extended hierarchy equation of motion
Author(s)
Duan, Chenru; Tang, Zhoufei; Cao, Jianshu; Wu, Jianlan
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With a decomposition scheme for the bath correlation function, the hierarchy equation of motion (HEOM) is extended to the zero-temperature sub-Ohmic spin-boson model, providing a numerically accurate prediction of quantum dynamics. As a dynamic approach, the extended HEOM determines the delocalized-localized (DL) phase transition from the extracted rate kernel and the coherent-incoherent dynamic transition from the short-time oscillation. As the bosonic bath approaches from the strong to weak sub-Ohmic regimes, a crossover behavior is identified for the critical Kondo parameter of the DL transition, accompanied by the transition from the coherent to incoherent dynamics in the localization.
Date issued
2017-06Department
Massachusetts Institute of Technology. Department of ChemistryJournal
Physical Review B
Publisher
American Physical Society
Citation
Duan, Chenru et al. “Zero-Temperature Localization in a Sub-Ohmic Spin-Boson Model Investigated by an Extended Hierarchy Equation of Motion.” Physical Review B 95.21 (2017): n. pag. © 2017 American Physical Society
Version: Final published version
ISSN
2469-9950
2469-9969