https://doi.org/10.1140/epjc/s10052-013-2444-4
Regular Article - Theoretical Physics
Critical behavior of QED3 at finite temperature and density
1
Department of Physics, Southeast University, Nanjing, 211189, China
2
Department of Physics, Nanjing University, Nanjing, 210093, China
3
Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing, 210093, China
4
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, CAS, Beijing, 100190, China
* e-mail: fenght@seu.edu.cn
Received:
16
February
2013
Revised:
25
March
2013
Published online:
29
May
2013
Within a range of fermion masses and taking into account the influence of the chemical potential on the boson propagator, the dependence of the chiral susceptibility on temperature and chemical potential is investigated to gain insight in the phase transition of QED3. We show that, at high temperature, the system demonstrates a second-order phase transition characteristic in the chiral limit and illustrates a crossover beyond the chiral limit, while in the high density region it exhibits a first-order transition when the fermion mass is small but always reveals a crossover when the fermion mass exceeds a critical value m c .
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
