TY  - JOUR
A1  - Zhang, Bo
A1  - Henkel, Carsten
T1  - Magnetic noise around metallic microstructures
N2  - We compute the local spectrum of the magnetic field near a metallic microstructure at finite temperature. Our main focus is on deviations from a plane-layered geometry for which we review the main properties. Arbitrary geometries are handled with the help of numerical calculations based on surface integral equations. The magnetic noise shows a significant polarization anisotropy above flat wires with finite lateral width, in stark contrast to an infinitely wide wire. Within the limits of a two-dimensional setting, our results provide accurate estimates for loss and dephasing rates in so-called `atom chip traps' based on metallic wires. A simple approximation based on the incoherent summation of local current elements gives qualitative agreement with the numerics, but fails to describe current correlations among neighboring objects.
Y1  - 2007
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/31350
UR  - http://dx.doi.org/10.1063/1.2800174
SN  - 0021-8979
ER  -