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Title: Pump Spectral Bandwidth, Birefringence, and Entanglement in Type-II Parametric Down Conversion

The twin photons produced by a type-II spontaneous parametric down conversion are well know as a potential source of photons for quantum teleportation due to the strong entanglement in polarization. This strong entanglement in polarization, however, depends on the spectral composition of the pump photon and the nature of optical isotropy of the crystal. By exact numerical calculation of the concurrence, we have shown that how pump photons spectral width and the birefringence nature of the crystal directly affect the degree of polarization entanglement of the twin photons.
Authors:
 [1]
  1. Department of Physics & Astronomy, Middle Tennessee State University, Murfreesboro, TN 37 132, USA
Publication Date:
OSTI Identifier:
1198250
Type:
Published Article
Journal Name:
Research Letters in Optics
Additional Journal Information:
Journal Volume: 2009; Related Information: CHORUS Timestamp: 2016-08-11 10:28:00; Journal ID: ISSN 1687-8175
Publisher:
Hindawi Publishing Corporation
Sponsoring Org:
USDOE
Country of Publication:
Country unknown/Code not available
Language:
English