Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/12536
Title: Experimental width shift distribution: A test of nonorthogonality for local and global perturbations
Authors: Gros, JB
Kuhl, U
Legrand, O
Mortessagne, F
Richalot, E
Savin, DV
Issue Date: 2014
Citation: Physical Review Letters,113, (22), (2014)
Abstract: The change of resonance widths in an open system under a perturbation of its interior has been recently introduced by Fyodorov and Savin [Phys. Rev. Lett. 108, 184101 (2012)] as a sensitive indicator of the nonorthogonality of resonance states. We experimentally study universal statistics of this quantity in weakly open two-dimensional microwave cavities and reverberation chambers realizing scalar and electromagnetic vector fields, respectively. We consider global as well as local perturbations, and also extend the theory to treat the latter case. The influence of the perturbation type on the width shift distribution is more pronounced for many-channel systems. We compare the theory to experimental results for one and two attached antennas and to numerical simulations with higher channel numbers, observing a good agreement in all cases.
URI: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.224101
http://bura.brunel.ac.uk/handle/2438/12536
DOI: http://dx.doi.org/10.1103/PhysRevLett.113.224101
ISSN: 0031-9007
1079-7114
Appears in Collections:Dept of Mathematics Research Papers

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