Consistent Thermodynamics for Quasiparticle Boson System with Zero Chemical Potential

摘要

The thermodynamic consistency of quasiparticle boson system with effectivemass $m^*$ and zero chemical potential is studied. We take the quasiparticlegluon plasma model as a toy model. The failure of previous treatments based ontraditional partial derivative is addressed. We show that a consistentthermodynamic treatment can be applied to such boson system provided that a newdegree of freedom $m^*$ is introduced in the partial derivative calculation. Apressure modification term different from the vacuum contribution is derivedbased on the new independent variable $m^*$. A complete and self-consistentthermodynamic treatment for quasiparticle system, which can be widely appliedto effective mass models, has been constructed.