Berlin 2001 – wissenschaftliches Programm
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Q: Quantenoptik
Q 17: Poster: Cooling and Trapping
Q 17.9: Poster
Mittwoch, 4. April 2001, 12:30–15:00, AT2
Thermal and ‘quantised’ magnetostatics — •Carsten Henkel1 and Stefan Scheel2 — 1Institut für Physik, Universität Potsdam — 2Theoretisch-Physikalisches Institut F. Schiller Universität Jena
Thermal magnetic fields play an important role for biophysics and integrated atom traps. They ‘leak out’ of metallic objects, and in the near field, they dominate the magnetic noise compared to the blackbody field. We develop an effective theory for these noise fields and compute their spectral density and spatial correlation function. Our approach is based on the phenomenological quantisation of the macroscopic Maxwell equations, and nevertheless, the field propagation is essentially governed by magnetostatics at distances smaller than the wavelength.