Quantum Condensation, Thermodynamic Limit, and Dimensionality

Gerhart Lüders 1
  • 1 Institut für Theoretische Physik, Universität Göttingen


With the help of a convenient version of the method of the quasi-expectation value it is shown that quantum condensation of an interacting boson gas does not occur in finite systems and even not if the thermodynamic limit is performed with respect to one or two space dimensions only.

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A Journal of Physical Sciences: Zeitschrift für Naturforschung A (ZNA) is an international scientific journal which publishes original research papers from all areas of experimental and theoretical physics. In accordance with the name of the journal, which means “Journal for Natural Sciences”, manuscripts submitted to ZNA should have a tangible connection to actual physical phenomena.