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Calculation of Particle-Number Susceptibility of QED3 at Finite Temperature |
| HU Fei1, JIANG Yu1, FENG Hong-Tao1, SUN Wei-Min1,2, ZONG Hong-Shi 1,2,3 |
| 1Department of Physics, Nanjing University, Nanjing 2100932Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093 |
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| Cite this article: |
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HU Fei, JIANG Yu, FENG Hong-Tao et al 2008 Chin. Phys. Lett. 25 2823-2826 |
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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.
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| Keywords:
11.10.Kk
11.15.Tk
11.30.Qc
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Received: 19 February 2008
Published: 25 July 2008
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| PACS: |
11.10.Kk
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(Field theories in dimensions other than four)
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11.15.Tk
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(Other nonperturbative techniques)
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11.30.Qc
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(Spontaneous and radiative symmetry breaking)
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