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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Fast dynamics of pair correlations in many-body systems
 Poprocký, Mojmír ; Lipavský, Pavel (advisor) ; Kalvová, Anděla (referee)
The atoms of ultra-cold gas interact via Feshbach resonance effectively described as s-wave interaction. The effective interaction can be manipulated with magnetic field to be weak or very strong, either repulsive or attractive. We study the energy transfer to the ultracold Fermi gas due to the interaction-strength change done by the magnetic ramp. The energy is transferred via quasiparticle energies, during collisions, and in Bose-exchange processes of correlated pairs. These three contributions are discussed, calculated in limit cases (in the Boltzmann regime and at zero temperature) and compared.
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Relation between Schrödinger equation and diffusion equation
 Poprocký, Mojmír ; Stránský, Pavel (advisor) ; Cejnar, Pavel (referee)
The Schrodinger's equation and the diffusion equation can be written in a similar form. While the Schrodinger's equation is complex, the diffusion equation is real. In this thesis we wish to outline similarities of both equations. We present a way to treat a problem in non-relativistic quantum mechanics as a diffusion process. This shows that under certain circumstances both theories are equivalent. We demonstrate this on a few simple examples.
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