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Abstract: We extend a result by Ojima on spontaneous symmetry breaking of Lorentzboosts in thermal KMS states and show that it is in fact a special case in amore general class of examples of spontaneous symmetry breaking of Lorentzsymmetry in relativistic many-body systems. Furthermore we analyse the natureof the corresponding Goldstone phenomenon and the type of Goldstone excitationsprovided they have particle character.



Autor: Manfred Requardt

Fuente: https://arxiv.org/







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