Abstract
The Lorentz invariance of a relativistic QFT is shown to be broken spontaneously at finite temperature with a zero-energy Goldstone spectrum which does not necessarily carry a one-particle structure. The Lorentz behaviour of the temperature is determined and the relation between Gibbs states in different Lorentz frames is clarified.
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Ojima, I. Lorentz invariance vs. temperature in QFT. Lett Math Phys 11, 73–80 (1986). https://doi.org/10.1007/BF00417467
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DOI: https://doi.org/10.1007/BF00417467