FERREIRA, E. J. B.; http://lattes.cnpq.br/6612628477862818; FERREIRA, Éwerton Jéferson Barbosa.
Résumé:
The Robert Brown (1828) observations about pollen grains random movement marked the
beginning of the currently phenomenon called by Brownian Motion which to referyourself
random displacement a particle perform in a surrounding fluid medium. The disorderly
movimento of the Brownian particle is consequences their constant collisions with the
molecules or atoms of the medium. There is also the Quantum Brownian Motion of
a particle where the stochastic movement is motivated by the quantum vacuum field
fluctuations. In the present work we study the quantum Brownian motion of a particle in an
conformal expanding Bose-Einstein condensate Friedmann-Robertson-Walker considering
noncommutative corrections. The noncommutativity effects on velocity dispersion were
investigated and showed different types of influence, but in all cases despite the differences
noncommutative corrections had a similar characteristic: they approach a constant value
in the long time regime.