3 papers
hep-th2002
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…
cond-mat.stat-mech2000
Uniform semiclassical approximation in quantum statistical mechanics
C. A. A. de Carvalho, R. M. Cavalcanti, E. S. Fraga +1
We present a simple method to deal with caustics in the semiclassical approximation to the partition function of a one-dimensional quantum system. The procedure, which makes use of…
quant-ph1997
On the effectiveness of Gamow's method for calculating decay rates
R. M. Cavalcanti, C. A. A. de Carvalho
We examine Gamow's method for calculating the decay rate of a wave function initially located within a potential well. Using elementary techniques, we examine a very simple, exactl…