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6 papers · 2 filters
Quantum limit of decoherence: Environment induced superselection of energy eigenstates
Juan Pablo Paz, Wojciech Hubert Zurek
We investigate decoherence in the limit where the interaction with the environment is weak and the evolution is dominated by the self Hamiltonian of the system. We show that in thi…
Creation of photons in an oscillating cavity with two moving mirrors
Diego A. R. Dalvit, Francisco D. Mazzitelli
We study the creation of photons in a one dimensional oscillating cavity with two perfectly conducting moving walls. By means of a conformal transformation we derive a set of gener…
Influence Action and decoherence of hydrodynamic modes
Esteban Calzetta, Bei-lok Hu
We derive an influence action for the heat diffusion equation and from its spectral dependence show that long wavelength hydrodynamic modes are most readily decohered. The result i…
Exact time evolution in harmonic quantum Brownian motion
Fabian H. Gaioli, Edgardo T. Garcia Alvarez
We consider a particular (exactly soluble) model of the one discussed in a previous work. We show numerical results for the time evolution of the main dynamical quantities and comp…
The Gamow vectors and the Schwinger effect
Fabian H. Gaioli, Edgardo T. Garcia Alvarez, Mario A. Castagnino
We introduce a `proper time' formalism to study the instability of the vacuum in a uniform external electric field due to particle production. This formalism allows us to reduce a…
Exact derivation of the Langevin and master equations for harmonic quantum Brownian motion
Edgardo T. Garcia Alvarez, Fabian H. Gaioli
A many particle Hamiltonian, where the interaction term conserves the number of particles, is considered. A master equation for the populations of the different levels is derived i…