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Title: Microwave fidelity studies by varying antenna coupling
Author: Kober, B.
Kuhl, U.
Stockmann, H.-J.
Gorin, T.
Savin, D.V.
Seligman, T.H.
Issue Date: 2010
Abstract: The fidelity decay in a microwave billiard is considered, where the coupling to an attached antenna is varied. The resulting quantity, coupling fidelity, is experimentally studied for three different terminators of the varied antenna: a hard-wall reflection, an open wall reflection, and a 50Ω load, corresponding to a totally open channel. The model description in terms of an effective Hamiltonian with a complex coupling constant is given. Quantitative agreement is found with the theory obtained from a modified VWZ approach. © 2010 The American Physical Society.
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