Gauge fields at finite temperature: ''thermo field dymanics'' and the KMS condition and their extension to gauge theories

Journal Article · Sun Nov 01 00:00:00 EST 1981 · Ann. Phys. (N.Y.); (United States)

DOI:https://doi.org/10.1016/0003-4916(81)90058-0· OSTI ID:6013702

Ojima, I

''Thermo field dynamics'', allowing the Feynman diagram method to be applied to real-time causal Green's functions at finite temperatures (not temperature Green's functions with imaginary times) expressed in the form of ''vacuum'' expectation values, in reconsidered in light of its connection with the algebraic formulation of statistical mechanics based upon the KMS condition. On the basis of so-obtained general basic formulae, the formalism is extended to the case of gauge theories, where the subsidiary condition specifying physical states, the notion of observables, and the structure of the physical subspace at finite temperatures are clarified.

• Research Organization: The Institute for Advanced Study, Princeton, New Jersey 08540
• OSTI ID: 6013702
• Journal Information: Ann. Phys. (N.Y.); (United States), Vol. 137:1
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUANTUM FIELD THEORY
GAUGE INVARIANCE
GREEN FUNCTION
COMMUTATION RELATIONS
EXPECTATION VALUE
FERMIONS
FEYNMAN DIAGRAM
HAMILTONIANS
QUANTUM OPERATORS
STATISTICAL MECHANICS
DIAGRAMS
FIELD THEORIES
FUNCTIONS
INVARIANCE PRINCIPLES
MATHEMATICAL OPERATORS
MECHANICS
645400* - High Energy Physics- Field Theory