14 citations · 40 across the 5 of their papers we have counts for
11 papers
Exact Effective action for (1+1)-dimensional fermions in an Abelian background at finite temperature and chemical potential
Soraya G. Maciel, Silvana Perez
In this paper we study the effects of a nonzero chemical potential in the effective action for massless fermions in (1+1) dimensions in an abelian gauge field background at finite…
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…
Thermal Operator Representation of Finite Temperature Graphs
Fernando T. Brandt, Ashok Das, Olivier Espinosa +2
Using the mixed space representation (t,p) in the context of scalar field theories, we prove in a simple manner that the Feynman graphs at finite temperature are related to the cor…