【摘要】 从QED中光子传播子的Schweinger Dyson方程出发 ,得到一个有用的德拜质量和热力学压强之间的关系 .利用这个关系以及有限温度与有限化学势下的相关压强计算了德拜质量的双圈修正 .其结果显示双圈修正减少了德拜屏蔽质量 .最后还讨论了QED等离子体中的磁质量更多还原

【Abstract】 Starting from the Schwinger-Dyson equation for the photon propagator in QED, we derive a useful relation between the Debye mass and the thermodynamic pressure. Using this relation, we calculate the two-loop Debye mass from relevant pressures at finite temperature and chemical potential. The result indicates that the two-loop correction decreases the Debye screening mass. We also discuss the magnetic mass in QED plasma.更多还原