Gaussian Wavefunctional Approach in Thermofield Dynamics
摘要
The Gaussian wavefunctional approach is developed in thermofield dynamics. We manufacture thermal vacuum wavefunctional, its creation as well as annihilation operators,and accordingly thermo-particle excited states. For a (D+1)-dimensional scalar field system with an arbitrary potential whose Fourier representation exists in a sense of tempered distributions, we calculate the finite temperature Gaussian effective potential (FTGEP), one- and two-thermo-particle-state energies. The zero-temperature limit of each of them is just the corresponding result in quantum field theory, and the FTGEP can lead to the same one of each of some concrete models as calculated by the imaginary time Green function.
引用
@article{arxiv.hep-th/9807025,
title = {Gaussian Wavefunctional Approach in Thermofield Dynamics},
author = {Wen-Fa Lu},
journal= {arXiv preprint arXiv:hep-th/9807025},
year = {2008}
}
备注
the revised version of hep-th/9807025, with one equation being added, a few sentences rewritten, and some spelling mistakes corrected. 7 page, Revtex, no figure