In relativistic theories particle number is not conserved (although both lepton and baryon number are). Therefore when discussing the thermodynamics of a quantum field theory one uses the grand canonical formalism: the entropy S is maximised, keeping fixed the ensemble averages E and N of energy and lepton or baryon number. To implement these constraints two Lagrange multipliers are introduced, beta =1/kT and mu the chemical potential.
%0 Journal Article
%1 Kapusta198915
%A Kapusta, J I
%A Landshoff, P V
%D 1989
%J J. Phys. G: Nucl. Part. Phys.
%K imported
%T Finite-temperature field theory
%V 15
%X In relativistic theories particle number is not conserved (although both lepton and baryon number are). Therefore when discussing the thermodynamics of a quantum field theory one uses the grand canonical formalism: the entropy S is maximised, keeping fixed the ensemble averages E and N of energy and lepton or baryon number. To implement these constraints two Lagrange multipliers are introduced, beta =1/kT and mu the chemical potential.
@article{Kapusta198915,
abstract = {In relativistic theories particle number is not conserved (although both lepton and baryon number are). Therefore when discussing the thermodynamics of a quantum field theory one uses the grand canonical formalism: the entropy S is maximised, keeping fixed the ensemble averages E and N of energy and lepton or baryon number. To implement these constraints two Lagrange multipliers are introduced, beta =1/kT and mu the chemical potential.},
added-at = {2014-09-15T08:49:36.000+0200},
author = {Kapusta, J I and Landshoff, P V},
biburl = {https://www.bibsonomy.org/bibtex/21d7110c8360c054691a6cd9700e67e7f/zhaozhh02},
file = {Kapusta198915.pdf:Kapusta198915.pdf:PDF},
interhash = {73d2fa70269dd5111028306fb0a21557},
intrahash = {1d7110c8360c054691a6cd9700e67e7f},
journal = {J. Phys. G: Nucl. Part. Phys.},
keywords = {imported},
owner = {zhao},
timestamp = {2014-09-15T08:49:36.000+0200},
title = {Finite-temperature field theory},
volume = 15,
year = 1989
}