From pure Schrodingerian to statistical dynamics

Autor(en): Gemmer, J 
Michel, M
Stichwörter: Nanoscience & Nanotechnology; nonequilibrium and irreversible thermodynamics; Physics; Physics, Condensed Matter; quantum statistical mechanics; quantum transport; Science & Technology - Other Topics
Erscheinungsdatum: 2005
Herausgeber: ELSEVIER SCIENCE BV
Journal: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volumen: 29
Ausgabe: 1-2
Startseite: 136
Seitenende: 144
Zusammenfassung: 
Many processes in nature seem to be entirely controlled by transition rates and the corresponding statistical dynamics. Some of them are in essence quantum, like the decay of excited states, the tunneling through barriers or the decay of unstable nuclei. Thus, starting from first principles, those systems should be analyzed on the basis of the Schrodinger equation. In the present paper, we consider a two-level system coupled to an environment which is basically described by a two-band energy scheme. For appropriately tuned environment parameters, the excitation probability of the two-level system exhibits statistical dynamics, while the full system follows the coherent, unitary pure-state, evolution generated by the Schrodinger equation. (c) 2005 Elsevier B.V. All rights reserved.
Beschreibung: 
International Conference on Frontiers of Quantum and Mesoscopic Thermodynamics (FQMT04), Prague, CZECH REPUBLIC, JUL 26-29, 2004
ISSN: 13869477
DOI: 10.1016/j.physe.2005.05.011

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