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Flow equation renormalization of a spin-boson model with a structured bath

✍ Scribed by Silvia Kleff; Stefan Kehrein; Jan von Delft

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
138 KB
Volume
18
Category
Article
ISSN
1386-9477

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✦ Synopsis

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), thereby decoupling the small quantum system from its environment, and calculate spin-spin correlation functions.

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