Thermodynamical properties of the relativistic quantum scalar plasma
Abstract
Results of previous theoretical studies of a relativistic quantum scalar plasma (i.e., a system of spin 1/2 baryons interacting through a scalar field) at 0 K are extended to finite temperatures in the Hartree approximation by using a method based on the oneparticle covariant Wigner function. A mass equation that completely governs the thermodynamic behavior of the system is obtained, and the equations of state of the system are derived from the system's total energymomentum tensor as well as from the average baryonic fourcurrent. Numerical results are presented in plots of effective mass vs. Fermi momentum and pressure vs. energy per particle for a specified value of one governing parameter and for several temperatures. Pressure is also plotted against chemical potential for another value of the governing parameter, and a phase diagram of the relativistic quantum scalar plasma is given. Five regions are identified in the phase diagram, including one where the system is in a collective bound state and the equation of state does not behave in a Van der Waals manner.
 Publication:

Physics Letters A
 Pub Date:
 June 1978
 DOI:
 10.1016/03759601(78)904024
 Bibcode:
 1978PhLA...66..476D
 Keywords:

 Baryons;
 Cosmic Plasma;
 Hartree Approximation;
 Plasma Physics;
 Relativistic Plasmas;
 Thermodynamic Properties;
 Phase Diagrams;
 Quantum Theory;
 Astrophysics