731 research outputs found
Convergence to equilibrium for many particle systems
The goal of this paper is to give a short review of recent results of the
authors concerning classical Hamiltonian many particle systems. We hope that
these results support the new possible formulation of Boltzmann's ergodicity
hypothesis which sounds as follows. For almost all potentials, the minimal
contact with external world, through only one particle of , is sufficient
for ergodicity. But only if this contact has no memory. Also new results for
quantum case are presented
Estimations of electron-positron pair production at high-intensity laser interaction with high-Z targets
Electron-positron pairs' generation occuring in the interaction of
-~W/cm laser radiation with high-Z targets are examined.
Computational results are presented for the pair production and the positron
yield from the target with allowance for the contribution of pair production
processes due to electrons and bremsstrahlung photons.
Monte-Carlo simulations using the PRIZMA code confirm the estimates obtained.
The possible positron yield from high-Z targets irradiated by picosecond lasers
of power -~TW is estimated to be -
- …