Fermionic Casimir effect in case of Andreev reflectionA. Bulgac1, P. Magierski1, 2 and A. Wirzba3
1 Department of Physics, University of Washington - Seattle, WA 98195-1560, USA
2 Faculty of Physics, Warsaw University of Technology ul. Koszykowa 75, 00-662 Warsaw, Poland
3 Institut für Kernphysik, Forschungszentrum Jülich - D-52425 Jülich, Germany
received 8 July 2005; accepted 14 September 2005
published online 5 October 2005
We describe the fermionic Casimir effect in the case of two spherical superfluid scatterers immersed in a normal Fermi system. It is shown that due to the focusing property of Andreev reflection this new Casimir-like energy is significantly enhanced when compared to the case of normal scatterers with specular reflection.
03.65.Sq - Semiclassical theories and applications.
74.45.+c - Proximity effects; Andreev effect; SN and SNS junctions.
74.81.-g - Inhomogeneous superconductors and superconducting systems.
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