3 papers
cond-mat.mes-hall2017
Dynamical Correlation Functions of the Quadratic Coupling Spin-Boson Model
Da-Chuan Zheng, Ning-Hua Tong
The spin-boson model with quadratic coupling is studied using the bosonic numerical renormalization group method. We focus on the dynamical auto-correlation functions , w…
cond-mat.mes-hall2017
Equilibrium Dynamics of the Sub-Ohmic Spin-boson Model Under Bias
Da-Chuan Zheng, Ning-Hua Tong
Using the bosonic numerical renormalization group method, we studied the equilibrium dynamical correlation function of the spin operator for the biased sub-Ohmic spin-…
cond-mat.mes-hall2016
Impurity-Induced Environmental Quantum Phase Transitions in the Quadratic-Coupling Spin-Boson Model
Da-Chuan Zheng, Li Wan, Ning-Hua Tong
We study the zero temperature properties of the sub-Ohmic spin-boson model with quadratic spin-boson coupling. This model describes experimental set ups at the optimal working poin…