Abstract
The concept of thermodynamical correlation functions for non-equilibrium states used byKadanoff andBaym in transport theory is generalized by means ofBogoliubov's quasi-averages in order to describe transport phenomena in systems with Bose-Einstein condensation. The one-particle Green's function is decomposed in one part describing the condensed particles and a second one describing the elementary excitations. The coupled equations of motion for these functions are derived and some consequences for the case of slowly varying disturbances are discussed.
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Extract of the dissertation on „Transporttheorie für ein verdünntes Gas mit Bose-Einstein-Kondensation,‘ by Dipl. Phys.Wolfgang Götze, accepted by the Fakultät für Allgemeine Wissenschaften der Technischen Hochschule München.
These investigations were suggested by Prof. Dr. W.Wild. I thank him kindly for many interesting and stimulating discussions. I wish to thank Prof. Dr. W.Brenig for his critics and helpful comments. Many discussions with Dipl. Phys. H.Schmidt are acknowledged.
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Götze, W. On transport theory of Bose systems. I. Z. Physik 177, 300–319 (1964). https://doi.org/10.1007/BF01375502
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DOI: https://doi.org/10.1007/BF01375502