Effective Potential at Finite Temperature: RG improvement vs. High temperature expansion
Nakkagawa, Hisao · Yokota, Hiroshi
Original · EN
We have applied the recently proposed renormalization group improvement procedure of the finite temperature effective potential, and have investigated extensively the phase structure of the massive scalar ϕ⁴ model, showing that the ϕ⁴ model has a rich 3-phase structure at T ≠ 0, two of them are not seen in the ordinary perturbative analysis. Temperature dependent phase transition in this model is shown to be strongly the first order.
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