The ground state of a two-level system coupled to a dispersionless phonon bath is studied. The exact ground-state solution to the problem is obtained via a combination of unitary transformations and numerical diagonalization. The impossibility of the discontinuous localization-delocalization transit
The quantum tunneling-localization transition of the ground state of a spin-boson system
β Scribed by Toshio Tsuzuki
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 285 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0038-1098
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
An expression of the ground state energy E SB of the spin-boson Hamiltonian H SB is considered. The expression in the cases of both massive and massless bosons is given by a nonperturbative method. By using the expression, we show a necessary and sufficient condition with respect to a parameter G #
A generalization of the standard spin-boson model is considered. The Hamiltonian H(:) of the model with a coupling parameter : # R acts in the tensor product H F b of a Hilbert space H and the boson (symmetric) Fock space F b over L 2 (R & ). The existence and uniqueness of ground states of H(:) are