Quantum coherence of spin-boson model at finite temperature
Sign Up to like & getrecommendations! Published in 2017 at "Annals of Physics"
DOI: 10.1016/j.aop.2017.01.014
Abstract: Abstract We investigate the dynamical behavior of quantum coherence in spin-boson model, which consists of a qubit coupled to a finite-temperature bosonic bath with power-law spectral density beyond rotating wave approximation, by employing l 1… read more here.
Keywords: boson model; quantum coherence; spin boson; temperature ... See more keywords
Dynamics of the nonequilibrium spin-boson model: A benchmark of master equations and their validity
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review A"
DOI: 10.1103/physreva.110.042428
Abstract: In recent years, there has been tremendous focus on identifying whether effective descriptions of open quantum systems such as master equations, can accurately describe the dynamics of open quantum systems. One particular question is whether… read more here.
Keywords: boson model; spin boson; master; master equations ... See more keywords
Spin-boson model of quantum dissipation in graphene: Nonlinear electrical response
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.104.085411
Abstract: Dissipation in the quantum solid of graphene is couched in the methodology of nonequilibrium statistical mechanics of an open quantum system. Of specific interest is the absorption accompanied by relaxation of energy because of an… read more here.
Keywords: spin boson; response; graphene; boson model ... See more keywords
Quantum Monte Carlo simulation of spin-boson models using wormhole updates
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.105.165129
Abstract: We present an exact quantum Monte Carlo method for spin systems coupled to dissipative bosonic baths which makes use of nonlocal wormhole updates to simulate the retarded spin-flip interactions originating from an off-diagonal spin-boson coupling.… read more here.
Keywords: monte carlo; spin boson; wormhole updates; spin ... See more keywords
Equivalence between the second order steady state for the spin-boson model and its quantum mean force Gibbs state
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review B"
DOI: 10.1103/physrevb.111.115423
Abstract: When the coupling of a quantum system to its environment is non-negligible, its steady state is known to deviate from the textbook Gibbs state. The Bloch-Redfield quantum master equation, one of the most widely adopted… read more here.
Keywords: spin boson; steady state; quantum; state ... See more keywords
Zero-temperature localization in a sub-Ohmic spin-boson model investigated by an extended hierarchy equation of motion
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.95.214308
Abstract: 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,… read more here.
Keywords: spin boson; equation motion; hierarchy equation; sub ohmic ... See more keywords
Uncovering nonperturbative dynamics of the biased sub-Ohmic spin-boson model with variational matrix product states
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.115427
Abstract: We study the dynamics of the biased sub-Ohmic spin-boson model by means of a time-dependent variational matrix product state (TDVMPS) algorithm. The evolution of both the system and the environment is obtained in the weak-… read more here.
Keywords: spin boson; dynamics biased; spin; sub ohmic ... See more keywords
Dynamical signatures of quantum chaos and relaxation time scales in a spin-boson system.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review. E"
DOI: 10.1103/physreve.100.012218
Abstract: Quantum systems whose classical counterparts are chaotic typically have highly correlated eigenvalues and level statistics that coincide with those from ensembles of full random matrices. A dynamical manifestation of these correlations comes in the form… read more here.
Keywords: system; time; relaxation time; spin boson ... See more keywords
Energy conductance across a mesoscopic junction in a nonequilibrium spin-boson model under the influence of telegraph noise.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.105.044128
Abstract: A spin-boson model in the presence of a telegraph noise (TN) source is employed to calculate the energy conductance between a tunnel junction and two bosonic baths. A polaron-transformed coupling term with the bosonic baths… read more here.
Keywords: spin; energy; boson model; spin boson ... See more keywords
Hidden Phase of the Spin-Boson Model.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.120406
Abstract: A quantum two-level system immersed in a sub-Ohmic bath experiences enhanced low-frequency quantum statistical fluctuations which render the nonequilibrium quantum dynamics highly non-Markovian. Upon using the numerically exact time-evolving matrix product operator approach, we investigate… read more here.
Keywords: spin boson; hidden phase; phase spin; phase ... See more keywords
Sufficient Condition for Gapless Spin-Boson Lindbladians, and Its Connection to Dissipative Time Crystals.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.130.180401
Abstract: We discuss a sufficient condition for gapless excitations in the Lindbladian master equation for collective spin-boson systems and permutationally invariant systems. The condition relates a nonzero macroscopic cumulant correlation in the steady state to the… read more here.
Keywords: condition gapless; sufficient condition; spin boson; gapless ... See more keywords