title: Temperature-resonant cyclotron spectra in confined geometries.
abstract: We consider a two-dimensional gas of colliding charged particles confined to finite size containers of various geometries and subjected to a uniform orthogonal magnetic field. The gas spectral densities are characterized by a broad peak at the cyclotron frequency. Unlike for infinitely extended gases, where the amplitude of the cyclotron peak grows linearly with temperature, here confinement causes such a peak to go through a maximum for an optimal temperature. In view of the fluctuation-dissipation theorem, the reported resonance effect has a direct counterpart in the electric susceptibility of the confined magnetized gas.
authors.affiliation: Department of Mathematics, University of Cape Town, Rondebosch 7701, South Africa.
authors.forename: A
authors.initials: A
authors.lastname: Pototsky
authors.forename: P
authors.initials: P
authors.lastname: Hänggi
authors.forename: F
authors.initials: F
authors.lastname: Marchesoni
authors.forename: S
authors.initials: S
authors.lastname: Savel'ev
mesh_terms: D001703:Biophysics / Q000379:methods*; D017357:Cyclotrons; D004563:Electrochemistry / Q000379:methods; D005740:Gases; D060526:Magnetic Fields; D015233:Models, Statistical; D008962:Models, Theoretical; D013269:Stochastic Processes; D013696:Temperature
chemical_list: D005740:Gases