69,422 research outputs found
An Exposition of the Connection between Limit-Periodic Potentials and Profinite Groups
We classify the hulls of different limit-periodic potentials and show that
the hull of a limit-periodic potential is a procyclic group. We describe how
limit-periodic potentials can be generated from a procyclic group and answer
arising questions. As an expository paper, we discuss the connection between
limit-periodic potentials and profinite groups as completely as possible and
review some recent results on Schroedinger operators obtained in this context
A Novel Optical Package for ATLAS Pixel Detector
An optical package of novel design has been developed for the ATLAS pixel
detector. The package contains two VCSELs and one PIN diode to transmit and
receive optical signals. The design is based on a simple connector-type concept
and is made of radiation-hard material. Several packages have been fabricated
and show promising results.Comment: 3 pages, 1 figure, to be published in Proc. of the 2000 Annual
Meeting of the Division of Particles and Fields of the American Physical
Society, Columbus, Ohi
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