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Spin-boson dynamics beyond conventional perturbation theories

Nesi, Francesco, Paladino, Elisabetta, Thorwart, Michael and Grifoni, Milena (2007) Spin-boson dynamics beyond conventional perturbation theories. Phys. Rev. B 76 (15; 15), p. 155323.

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A generalized approximation scheme is proposed to describe the dynamics of the spin-boson problem. Being nonperturbative in the coupling strength nor in the tunneling frequency, it gives reliable results over a wide regime of temperatures and coupling strength to the thermal environment for a large class of bath spectral densities. We use a path-integral approach and start from the exact solution ...


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Item type:Article
Date:25 October 2007
Institutions:Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni
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Keywords:boson systems, master equation, perturbation theory, tunnelling
Dewey Decimal Classification:500 Science > 530 Physics
Created at the University of Regensburg:Unknown
Item ID:9398
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