14 citations · 45 across the 7 of their papers we have counts for
5 papers · 1 filter
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…
Symmetry in noncommutative quantum mechanics
Olivier Espinosa, Patricio Gaete
We reconsider the generalization of standard quantum mechanics in which the position operators do not commute. We argue that the standard formalism found in the literature leads to…