Polarization-entanglement-conserving frequency conversion of photons

S. Ramelow, A. Fedrizzi, A. Poppe, N. K. Langford, A. Zeilinger

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Entangled photons play a pivotal role in the distribution of quantum information in quantum networks. However, the frequency bands for optimal transmission and storage of photons are often not the same. Here, we experimentally demonstrate the coherent frequency conversion of photons entangled in their polarization, a widely used degree of freedom in photonic quantum information processing. We verify the successful entanglement conversion by violating a Clauser-Horne-Shimony-Holt (CHSH) Bell inequality and fully characterize our near-perfect entanglement transfer using both state and process tomography. Our implementation is robust and flexible, making it a practical building block for future quantum networks.

Original languageEnglish
Article number013845
Number of pages5
JournalPhysical Review A
Volume85
Issue number1
DOIs
Publication statusPublished - 30 Jan 2012

Keywords

  • LINBO3 WAVE-GUIDES
  • UP-CONVERSION
  • QUANTUM TRANSDUCTION
  • COMMUNICATION
  • EFFICIENT
  • BAND

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