Renormalization in Quantum Statistics of Systems with Spontaneous Symmetry Breaking
M. Chaichian, J. L. Lucio M., C. Montonen, H. Perez Rojas, M. Vargas
Abstract
Renormalization in quantum statistics in the presence of a charge associated to a spontaneously broken symmetry is discussed for the scalar field model. In contrast to the case of non-broken symmetry, the renormalization mass counterterm depends on the chemical potential. We argue that this is connected to the ill-defined character of the charge operator.
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