Calculation of quantum escape rates from a metastable well |
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| Authors: | Grabert H. Olschowski P. Weiss U. |
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| Affiliation: | (1) Service de Physique du Solide, CEN Saclay, F-91191 Gif-sur-Yvette, France;(2) Institut für Theoretische Physik, Universität Stuttgart, Pfaffenwaldring 57/III, D-7000 Stuttgart 80, Federal Republic of Germany |
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| Abstract: | The quantum-mechanical decay of a metastable state of a system coupled to a heat bath environment is studied. A functional integral method is presented allowing for the calculation of decay rates at finite temperatures and in the presence of dissipation. Analytical methods for high and intermediate temperatures are combined with an accurate numerical method for low temperatures where the system decays by quantum tunneling. Explicit results are given for a system with a cubic potential and frequency-independent damping.Dedicated to Professor Harry Thomas on the occasion of his 60th birthday |
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