We discuss the dynamics of a spin coupled to a damped harmonic oscillator. This system can be mapped to a spin-boson model with a structured bath, i.e. the spectral function of the bath has a resonance peak. We diagonalize the model by means of inΓΏnitesimal unitary transformations ( ow equations), t
On the spin-boson model with a sub-ohmic bath
β Scribed by Stefan K. Kehrein; Andreas Mielke
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 583 KB
- Volume
- 219
- Category
- Article
- ISSN
- 0375-9601
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π SIMILAR VOLUMES
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
## Abstract Proton magnetization transfer contrast (MTC) imaging, using continuous wave offβresonance irradiation, was performed on the rat brain __in vivo__ at 4.7 Tesla. The observed MTC was studied in three different brain regions: the __corpus callosum__, the basal ganglia, and the temporal lob