White Noise and Heating of Open Quantum Field Fermi Systems

Details White Noise and Heating of Open Quantum Field Fermi Systems White Noise and Heating of Open Quantum Field Fermi Systems

1993-02-09

arxiv.org/abs/hep-th/9302031v1

Physics

High Energy Physics

High Energy Physics - Theory

16pp, LATEX, CERN-TH.6719/92

Scientific paper

I study the time evolution of the density matrices of quantum Fermi systems interacting with classic external Fermi fields. This interaction either changes the temperature of the system or it affects the density of particles. For relativistic Dirac fermions, variations of temperature lead to creation (annihilation) of particle - antiparticle pairs. The change of the density (or of the chemical potential) indicates the existence of the incoming (outgoing) flux of fermions from (to) the bath. These changes are independent for the different modes and in order to model the thermalization one should adjust the spectrum of the noise. The linear time dependences of the densities of particles are characteristic for all the processes.

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