45 citations · 199 across the 11 of their papers we have counts for
11 papers
Frequency-dependent current noise in quantum heat transfer with full counting statistics
Junjie Liu, Chang-Yu Hsieh, Jianshu Cao
To investigate frequency-dependent current noise (FDCN) in open quantum systems at steady states, we present a theory which combines Markovian quantum master equations with a finit…
Polaron dynamics with off-diagonal coupling: beyond the Ehrenfest approximation
Zhongkai Huang, Lu Wang, Changqin Wu +3
Treated traditionally by the Ehrenfest approximation, dynamics of a one-dimensional molecular crystal model with off-diagonal exciton-phonon coupling is investigated in this work u…
Signature of non-Markovianity in time-resolved energy transfer
Junjie Liu, Hui Xu, Changqin Wu
We explore signatures of the non-Markovianity in the time-resolved energy transfer processes for quantum open systems. Focusing on typical systems such as the exact solvable damped…
Nonequilibrium spin-boson model: from weak to strong coupling
Junjie Liu, Hui Xu, Baowen Li +1
We present a general theory to explore energy transfer in nonequilibrium spin-boson models within the framework of nonequilibrium Green's function (NEGF). In contrast to convention…
Green's functions for spin boson systems: Beyond conventional perturbation theories
Junjie Liu, Hui Xu, Changqin Wu
Unraveling general properties of Green's functions of quantum dissipative systems is of both experimental relevance and theoretical interest. Here, we study the spin-boson model as…
Drift of Charge Carriers in Crystalline Organic Semiconductors
Jingjuan Dong, Wei Si, Chang-Qin Wu
We investigate the direct-current response of crystalline organic semiconductors in the presence of finite external electric fields by the quantum-classical Ehrenfest dynamics comp…
Temperature and Frequency Dependent Mean Free Paths of Renormalized Phonons in Nonlinear Lattices
Nianbei Li, Junjie Liu, Changqin Wu +1
In the regime of strong nonlinearity, the validity of conventional perturbation based phonon transport theories is questionable. In particular, the renormalized phonons instead of…
Variational approach to renormalized phonon in momentum-nonconserving nonlinear lattices
Junjie Liu, Baowen Li, Changqin Wu
A previously proposed variational approach for momentum-conserving systems [J. Liu et.al., Phys. Rev. E 91, 042910 (2015)] is extended to systematically investigate general momentu…
Decoherence and Energy Relaxation in the Quantum-Classical Dynamics for Charge Transport in Organic Semiconducting Crystals: an Instantaneous Decoherence Correction Approach
Wei Si, Chang-Qin Wu
We explore an instantaneous decoherence correction (IDC) approach for the decoherence and energy relaxation in the quantum-classical dynamics of charge transport in organic semicon…
Renormalized phonons in nonlinear lattices: A variational approach
Junjie Liu, Sha Liu, Nianbei Li +2
We propose a variational approach to study renormalized phonons in momentum conserving nonlinear lattices with either symmetric or asymmetric potentials. To investigate the influen…
Triggering waves in nonlinear lattices: Quest for anharmonic phonons and corresponding mean free paths
Sha Liu, Junjie Liu, Peter Hänggi +2
Guided by a stylized experiment we develop a self-consistent anharmonic phonon concept for nonlinear lattices which allows for explicit "visualization." The idea uses a small exter…