Quantum Dissipative Systems
- U. Weiss
- Physics
- 1 March 1993
Fundamentals Survey of the Various Approaches Path Integral Description of Open Quantum Systems Imaginary-Time and Real-Time Approaches Influence Functional Method Phenomenological and Microscopic…
Functional integral approach to time-dependent heat exchange in open quantum systems: general method and applications
- M. Carrega, P. Solinas, A. Braggio, M. Sassetti, U. Weiss
- Physics
- 22 December 2014
We establish the path integral approach for the time-dependent heat exchange of an externally driven quantum system coupled to a thermal reservoir. We derive the relevant influence functional and…
Quantum Tunneling in Dissipative Systems at Finite Temperatures
- H. Grabert, U. Weiss, P. Hänggi
- Materials Science
- 18 June 1984
A quantum system which can tunnel out of a metastable state, and which interacts with an environment at temperature $T$, is considered. It is found that heat enhances the tunneling probability at…
Crossover from thermal hopping to quantum tunneling
- H. Grabert, U. Weiss
- Physics
- 5 November 1984
On considere un systeme macroscopique rendu instable par fluctuation thermique et effet tunnel quantique. On deduit une formule generale pour le taux de decroissance
Quantum Fluctuations in Mesoscopic and Macroscopic Systems: Proceedings of the Adriatico Research Conference
- H. Cerdeira, F. López, U. Weiss
- Physics
- 1 May 1991
MACROSCOPIC QUANTUM COHERENCE
- U. Weiss, H. Grabert
- Physics
- 1986
Low-Temperature Properties of Biased Two-Level Systems: Effects of Frequency-Dependent Damping
- R. Görlich, M. Sassetti, U. Weiss
- Physics
- 15 November 1989
We study low-temperature effects of frequency-dependent damping on spectral and dynamical properties of biased two-level systems. Inherent inconsistencies of the noninteracting-blip approximation are…
Quantum theory of the damped harmonic oscillator
- H. Grabert, U. Weiss, P. Talkner
- Physics
- 1 March 1984
A phenomenological stochastic modelling of the process of thermal and quantal fluctuations of a damped harmonic oscillator is presented. The divergence of the momentum dispersion associated with the…
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