Thermal Operator and Cutting Rules at Finite Temperature and Chemical Potential
arXiv:hep-th/0607196 · doi:10.1103/PhysRevD.74.085006
Abstract
In the context of scalar field theories, both real and complex, we derive the cutting description at finite temperature (with zero/finite chemical potential) from the cutting rules at zero temperature through the action of a simple thermal operator. We give an alternative algebraic proof of the largest time equation which brings out the underlying physics of such a relation. As an application of the cutting description, we calculate the imaginary part of the one loop retarded self-energy at zero/finite temperature and finite chemical potential and show how this description can be used to calculate the dispersion relation as well as the full physical self-energy of thermal particles.
arXiv comment17 pages, 13 figures. Added references, version to appear in Physical Review D
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Cited by in corpus (4)
- Forward scattering amplitudes and the thermal operator representation
- Bogoliubov transformation and the thermal operator representation in the real time formalism
- Hard thermal effective action in QCD through the thermal operator
- Thermal Operator and Dispersion Relation in QED at Finite Temperature and Chemical Potential