Chiral phase transition in QED3 at finite temperature

• Published in: International journal of modern physics. A, Particles and fields, gravitation, cosmology Vol. 31; no. 36
• Main Authors: Yin, Pei-Lin, Xiao, Hai-Xiao, Wei, Wei, Feng, Hong-Tao, Zong, Hong-Shi
• Format: Journal Article
• Language: English
• Published: Singapore World Scientific Publishing Company 30.12.2016; World Scientific Publishing Co. Pte., Ltd
• Subjects: Broken symmetry; Condensates; Critical temperature; Flavors; Phase transitions; Physics; Restoration; Transition temperature; Dyson–Schwinger equations; QED3; chiral phase transition
• ISSN: 0217-751X; 1793-656X
• DOI: 10.1142/S0217751X16501980

In the framework of Dyson–Schwinger equations, we employ two kinds of criteria (one kind is the chiral condensate, the other kind is thermodynamic quantities, such as the pressure, the entropy, and the specific heat) to investigate the nature of chiral phase transitions in QED3 for different fermion flavors. It is found that the chiral phase transitions in QED3 for different fermion flavors are all typical second-order phase transitions; the critical temperature and order of the chiral phase transition obtained from the chiral condensate and susceptibility are the same with that obtained by the thermodynamic quantities, which means that they are equivalent in describing the chiral phase transition; the critical temperature decreases as the number of fermion flavors increases and there is a boundary that separates the T c – N f plane into chiral symmetry breaking and restoration regions.