摘要Based on the external field approach and the differential form of Ward identity, we derive a more compact formula for the particle-number susceptibility in QED3 at finite temperature. Using the zero frequency approximation the numerical value of the particle-number susceptibility is calculated in the Dyson--Schwinger approach for the case that the number of fermion flavours equals one and two, respectively. An enhanced fluctuation of the particle-number density is observed across the transition temperature, which should be an essential characteristic of chiral phase transition in QED3.
Abstract：Based on the external field approach and the differential form of Ward identity, we derive a more compact formula for the particle-number susceptibility in QED3 at finite temperature. Using the zero frequency approximation the numerical value of the particle-number susceptibility is calculated in the Dyson--Schwinger approach for the case that the number of fermion flavours equals one and two, respectively. An enhanced fluctuation of the particle-number density is observed across the transition temperature, which should be an essential characteristic of chiral phase transition in QED3.
HU Fei;JIANG Yu;FENG Hong-Tao;SUN Wei-Min;ZONG Hong-Shi;. Calculation of Particle-Number Susceptibility of QED3 at Finite Temperature[J]. 中国物理快报, 2008, 25(8): 2823-2826.
HU Fei, JIANG Yu, FENG Hong-Tao, SUN Wei-Min, ZONG Hong-Shi,. Calculation of Particle-Number Susceptibility of QED3 at Finite Temperature. Chin. Phys. Lett., 2008, 25(8): 2823-2826.
2008, Vol. 25 
