Acceleration of particles in an isotropic random force field

Details Acceleration of particles in an isotropic random force field Acceleration of particles in an isotropic random force field

2012-04-18

arxiv.org/abs/1204.5126v1

Physics

General Physics

11 pages, 3 figures

Scientific paper

If we have a particle immersed in a field of random forces, each interaction of the particle with the field can enlarge or diminish its kinetic energy. In this work is shown that in general, for any field of random force with uniform distribution of directions, the probability to gain kinetic energy is larger that the probability to lose it. Therefore, if the particle is submitted to a great number of interactions with the force stochastic field, the final result will be that the particle will gain energy. The probability to gain energy in each interaction is Pg=1/2 (1+T/(2Po)), where T is the impulse given by the field and Po is the momentum of the particle before the interaction. The probability to lose energy in each interaction is Pl=1/2 (1-T/(2Po)).

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