Thermal Operator Representation of Finite-Temperature Amplitudes in the Presence of Chemical Potential
M. Inui, H. Kohyama, A. Niegawa
Abstract
In a recent paper [Phys. Rev. D 72, 085006 (2005)], Brandt et al. deduced the thermal operator representation for a thermal N-point amplitude, both in the imaginary-time and real-time formalisms. In the case when a chemical potential present, however, the representation is not as simple as in the case with vanishing chemical potential. We propose a much simpler and transparent representation for the case of non-zero chemical potential.
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