276 citations · 780 across the 11 of their papers we have counts for
11 papers
Displacement operator for quantum systems with position-dependent mass
R. N. Costa Filho, M. P. Almeida, G. A. Farias +1
A translation operator is introduced to describe the quantum dynamics of a position-dependent mass particle in a null or constant potential. From this operator, we obtain a general…
Aeolian transport layer
M. P. Almeida, J. S. Andrade, H. J. Herrmann
We investigate the airborne transport of particles on a granular surface by the saltation mechanism through numerical simulation of particle motion coupled with turbulent flow. We…
Brazilian elections: voting for a scaling democracy
R. N. Costa Filho, M. P. Almeida, J. E. Moreira +1
The proportional elections held in Brazil in 1998 and 2002 display identical statistical signatures. In particular, the distribution of votes among candidates includes a power-law…
An additive variant of Tsallis generalized entropy
M. P. Almeida
This is an analysis of the additivity of the entropy of thermodynamical systems with finite heat baths. It is presented an expression for the physical entropy of weakly interacting…
Microscopic analog of temperature within nonextensive thermostatistics
M. P. Almeida, F. Q. Potiguar, U. M. S. Costa
It is presented a microscopic interpretation for the temperature within Tsallis thermostatistics, generalizing the classical derivation based on the Boltzmann-Gibbs statistics. It…
Tsallis thermostatistics for finite systems: a Hamiltonian approach
Artur B. Adib, Andre A. Moreira, Jose S. Andrade +1
We show that finite systems whose Hamiltonians obey a generalized homogeneity relation rigorously follow the nonextensive thermostatistics of Tsallis. In the thermodynamical limit,…