9 citations · 13 across the 8 of their papers we have counts for
8 papers
Effective potential in the BET formalism
A. Bessa, C. A. A. de Carvalho, E. S. Fraga +1
We calculate the one-loop effective potential at finite temperature for a system of massless scalar fields with quartic interaction in the framework of the boundary effectiv…
Pressure of massless hot scalar theory in the boundary effective theory framework
A. Bessa, F. T. Brandt, C. A. A. de Carvalho +1
We use the boundary effective theory (BET) approach to thermal field theory in order to calculate the pressure of a system of massless scalar fields with quartic interaction. The m…
An asymptotic universal focal decomposition for non-isochronous potentials
C. A. A. de Carvalho, M. M. Peixoto, D. Pinheiro +1
Galileo, in the XVII century, observed that the small oscillations of a pendulum seem to have constant period. In fact, the Taylor expansion of the period map of the pendulum is co…
Semiclassical calculation of decay rates
A. Bessa, C. A. A. de Carvalho, E. S. Fraga
Several relevant aspects of quantum-field processes can be well described by semiclassical methods. In particular, the knowledge of non-trivial classical solutions of the field equ…
Diagrammatics of the Dimensionally Reduced Action in phi^4 theory
C. Villavicencio, C. A. A. de Carvalho
We describe the Feynman rules for the construction of the Dimensionally Reduced Action (DRA) for a phi^4 field theory, as well as rules for the construction of the connected Green…
Alternative dimensional reduction via the density matrix: A test
C. A. A. de Carvalho, R. M. Cavalcanti
We derive and analyze the perturbation series for the classical effective action in quantum statistical mechanics, treated as a toy model for the dimensionally reduced effective ac…