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Robert Robson: „Boltzmann and fluid descriptions of electrons and positrons in gases and condensed matter”
School of Mathematics, Physics and I.T., James Cook University, Australia

Studies of charged particles in gases go back almost 100 years to the birth of modern atomic and quantum physics, with seminal experiments by J.J. Thompson, Townsend, Franck and Hertz, and others. This talk firstly reviews the modern kinetic theory of gases for electrons and positrons in gases, from the perspective of rigorous numerical solution of Boltmann's equation on the one hand, and on the other hand the less rigorous but more physically appealing fluid description. We then move on to a discussion of how these ideas and techniques might be used to understand the behaviour of electrons and positrons in soft condensed matter.