Thermo Field Dynamics and quantum algebras
E. Celeghini, S. De Martino, S. De Siena, A. Iorio, M. Rasetti, G. Vitiello
Abstract
The algebraic structure of Thermo Field Dynamics lies in the q-deformation of the algebra of creation and annihilation operators. Doubling of the degrees of freedom, tilde-conjugation rules, and Bogoliubov transformation for bosons and fermions are recognized as algebraic properties of hq(1) and of hq(1|1), respectively.
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