47 citations · 125 across the 15 of their papers we have counts for
15 papers
Entropy generation in cosmological particle creation
Mario A. Castagnino, Fabian H. Gaioli, Daniel M. Sforza
A very simplified model of the Universe is considered in order to propose an alternative approach to the irreversible evolution of the Universe at very early times. The entropy gen…
Minimal irreversible quantum mechanics. The decay of unstable states
Diego G. Arbo, Mario A. Castagnino, Fabian H. Gaioli +1
Brownian motion is modelled by a harmonic oscillator (Brownian particle) interacting with a continuous set of uncoupled harmonic oscillators. The interaction is linear in the coord…
Proper time derivatives in quantum mechanics
Juan P. Aparicio, Fabian H. Gaioli, Edgardo T. Garcia Alvarez
Several quantum proper time derivatives are obtained from the Beck one in the usual framework of relativistic quantum mechanics (spin 1/2 case). The ``scalar Hamiltonians'' of thes…
Some remarks about intrinsic parity in Ryder's derivation of the Dirac equation
Fabian H. Gaioli, Edgardo T. Garcia Alvarez
This work is a comment on Ryder's derivation of the Dirac equation, with emphasis on the physical contents of this equation: the notion of particles and antiparticles according to…
The problem of time in parametrized theories
Fabian H. Gaioli, Edgardo T. Garcia Alvarez
A common feature of reparametrization invariant theories is the difficulty involved in identifying an appropriate evolution parameter and in constructing a Hilbert space on states.…
Quantum Brownian motion
Fabian H. Gaioli, Edgardo T. Garcia Alvarez, Javier Guevara
We study the behavior of a subsystem (harmonic oscillator) in contact with a thermal reservoir (finite set of uncoupled harmonic oscillators). We exactly solve the eigenvalue probl…