Nonuniform-temperature effects on the QCD phase transition

arXiv (Cornell University)(2021)

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Abstract
We study the phase transition in a steady temperature-nonuniform system in the frame of the Ising model. We calculate the nonuniform-temperature effects on the phase transition point, the fluctuations, and the correlation length of the order parameter. We find the phase transition could happen at a temperature higher than the equilibrium phase transition temperature of a temperature-uniform system. Besides, the fluctuations and the correlation length are enhanced near the phase transition point, and they monotonously increase from the crossover regime to the first order phase transition regime without exotic behavior at the critical point. Our study is helpful to understand the behaviors of QCD phase transition in the relativistic heavy-ion collision and provides a method to evaluate the nonuniform-temperature effects for the order parameter.
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Key words
phase transition,temperature
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