TY - JOUR
T1 - Thermodynamics and quantum field theory
AU - Hardman, I.
AU - Umezawa, H.
AU - Yamanaka, Y.
N1 - Funding Information:
We would like to thank T.S. Evans for valuable discussions and reading of the manuscript. This work was partially supported by NSERC, Canada and the Dean of Science, the University of Alberta. One of the authors (I.H.) would like to thank the Canadian Commonwealth Scholarship Committee for financial support.
PY - 1990/6/4
Y1 - 1990/6/4
N2 - We describe the thermal change of a quantum field system using thermo field dynamics, an operator quantum theory. With this it is straightforward to discuss the change in thermal energy which we relate to thermodynamics. The fundamental concept is that it is necessary to recognize two sources of time dependence, one for the Heisenberg operators and one for the Heisenberg states; this is a radical departure from conventional quantum field theory and one that should find many applications.
AB - We describe the thermal change of a quantum field system using thermo field dynamics, an operator quantum theory. With this it is straightforward to discuss the change in thermal energy which we relate to thermodynamics. The fundamental concept is that it is necessary to recognize two sources of time dependence, one for the Heisenberg operators and one for the Heisenberg states; this is a radical departure from conventional quantum field theory and one that should find many applications.
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U2 - 10.1016/0375-9601(90)90957-P
DO - 10.1016/0375-9601(90)90957-P
M3 - Article
AN - SCOPUS:0011320857
SN - 0375-9601
VL - 146
SP - 293
EP - 298
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 6
ER -