31 citations · 46 across the 6 of their papers we have counts for
6 papers
The temperature influence on quantum tunneling in the spin-boson model
Zhi-De Chen, Ying-Hua Huang, Hang Wong
The existing studies of the temperature effect of the spin-boson model show that the tunneling splitting will increase with temperature, no matter how weak the couplings are betwee…
Coherent-incoherent transition in a Cooper-pair-box coupled to a quantum oscillator: an equilibrium approach
Ying-Hua Huang, Hang Wong, Zhi-De Chen
Temperature effect on quantum tunneling in a Cooper-pair-box coupled to a quantum oscillator is studied by both numerical and analytical calculations. It is found that, in strong c…
Density matrix renormalization group approach of the spin-boson model
Hang Wong, Zhi-De Chen
We propose a density matrix renormalization group approach to tackle a two-state system coupled to a bosonic bath with continuous spectrum. In this approach, the optimized phonon s…
Artifact of the phonon-induced localization by variational calculations in the spin-boson model
Zhi-De Chen, Hang Wong
We present energy and free energy analyses on all variational schemes used in the spin-boson model at both T=0 and . It is found that all the variational schemes have fail…
Variational Approach to the Spin-boson Model With a Sub-Ohmic Bath
Hang Wong, Zhi-De Chen
The influence of dissipation on quantum tunneling in the spin-boson model with a sub-Ohmic bath is studied by a variational calculation. By examining the evolution of solutions of…
Suppression of Quantum Phase Interference in Molecular Magnets Fe₈ with Dipolar-Dipolar Interaction
Zhi-De Chen, J. -Q. Liang, Shun-Qing Shen
Renormalized tunnel splitting with a finite distribution in the biaxial spin model for molecular magnets is obtained by taking into account the dipolar interaction of enviromental…