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Phys. Rev. Lett. 100, 091301 (2008) [4 pages]

Tabletop Creation of Entangled Multi-keV Photon Pairs and the Unruh Effect

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Ralf Schützhold1,*, Gernot Schaller1, and Dietrich Habs2
1Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany
2Department für Physik der Ludwig-Maximilians-Universität München und Maier-Leibnitz-Laboratorium, Am Coulombwall 1, 85748 Garching, Germany

Received 28 June 2007; published 3 March 2008

Electrons moving in a strong periodic electromagnetic field (e.g., laser or undulator) may convert quantum vacuum fluctuations into pairs of entangled photons, which can be understood in terms of the Unruh effect. Apart from verifying this striking phenomenon, the considered effect may allow the construction of a tabletop source for entangled photons (“photon pair laser”) and the associated quantum-optics applications in the multi-keV regime with near-future facilities.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.091301
DOI:
10.1103/PhysRevLett.100.091301
PACS:
04.62.+v, 12.20.Fv, 41.60.−m, 42.50.Dv

*schuetz@theory.phy.tu-dresden.de