Europhys. Lett.
Volume 72, Number 3, November 2005
Page(s) 327 - 333
Section General
Published online 05 October 2005
Europhys. Lett., 72 (3), pp. 327-333 (2005)
DOI: 10.1209/epl/i2005-10261-5

Fermionic Casimir effect in case of Andreev reflection

A. 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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