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- W1969804560 startingPage "3098" @default.
- W1969804560 abstract "Renormalized expressions for finite-temperature propagators are obtained in both a weak-coupling and $frac{1}{N}$ approximation to the $mathrm{O}(N)$ model with negative mass squared and $N$ real scalar fields. The weak-coupling results are given in spectral form. These Green's functions can be measured directly by allowing a weakly coupled interaction with an external probe. The singularity structure of the propagators is used to analyze the energy-momentum relation of the finite-temperature vacuum excitations, and the physical consequences of symmetry restoration are discussed. The renormalization prescription at zero temperature is sufficient for the finite-temperature theory in the broken-symmetry region as well as above the critical point. The tachyon found in the zero-temperature large-$N$ limit remains at finite temperature but is now mixed in with normal spacelike singularities." @default.
- W1969804560 created "2016-06-24" @default.
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- W1969804560 date "1975-11-15" @default.
- W1969804560 modified "2023-09-26" @default.
- W1969804560 title "Finite-temperature propagators for a spontaneously broken field theory" @default.
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- W1969804560 doi "https://doi.org/10.1103/physrevd.12.3098" @default.
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