28 citations · 128 across the 16 of their papers we have counts for
4 papers · 1 filter
Forward scattering amplitudes and the thermal operator representation
Fernando T. Brandt, Ashok Das, Josif Frenkel +1
We develop systematically to all orders the forward scattering description for retarded amplitudes in field theories at zero temperature. Subsequently, through the application of t…
Thermal Operator and Cutting Rules at Finite Temperature and Chemical Potential
F. T. Brandt, Ashok Das, Olivier Espinosa +2
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…
Thermal Operator Representation of Finite Temperature Graphs II
Fernando T. Brandt, Ashok Das, Olivier Espinosa +2
Using the mixed space representation, we extend our earlier analysis to the case of Dirac and gauge fields and show that in the absence of a chemical potential, the finite temperat…
Factorization of finite temperature graphs in thermal QED
Fernando T. Brandt, Ashok Das, Olivier Espinosa +2
We extend our previous analysis of gauge and Dirac fields in the presence of a chemical potential. We consider an alternate thermal operator which relates in a simple way the Feynm…