4 papers
Decoherence in the Pure Dephasing Spin-Boson Model with Hermitian or Non-Hermitian Bath
Yue-Hong Wu, Ning-Hua Tong
In this paper, we investigate the decoherence of qubit due to its coupling to a Hermitian or a non-Hermitian bath within the pure dephasing spin-boson model. First, using this mode…
Self-Consistent Random Phase Approximation from Projective Truncation Approximation Formalism
Yue-Hong Wu, Xinguo Ren, Ning-Hua Tong
We derive the self-consistent random phase approximations (sc-RPA) from the projective truncation approximation (PTA) for the equation of motion of two-time Green's function. The o…
Thermal Broadening of Phonon Spectral Function in Classical Lattice Models: Projective Truncation Approximation
Hu-Wei Jia, Wen-Jun Liu, Yue-Hong Wu +3
Thermal broadening of the quasi-particle peak in the spectral function is an important physical feature in many statistical systems, but it is difficult to calculate. To tackle thi…
Thermodynamics of Classical One-dimensional Klein-Gordon Lattice Model
Hu-Wei Jia, Ning-Hua Tong
In this paper, we study the thermodynamical properties of the classical one-dimensional Klein-Gordan lattice model () by using the cluster variation method with linear res…