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Stimulated emission of polarization-entangled photons

Author

Listed:
  • A. Lamas-Linares

    (Centre for Quantum Computation, Clarendon Laboratory, University of Oxford)

  • J. C. Howell

    (Centre for Quantum Computation, Clarendon Laboratory, University of Oxford)

  • D. Bouwmeester

    (Centre for Quantum Computation, Clarendon Laboratory, University of Oxford)

Abstract

Entangled photon pairs—discrete light quanta that exhibit non-classical correlations—play a crucial role in quantum information science (for example, in demonstrations of quantum non-locality1,2,3,4,5,6,7, quantum teleportation8,9 and quantum cryptography10,11,12,31). At the macroscopic optical-field level non-classical correlations can also be important, as in the case of squeezed light13, entangled light beams14,15 and teleportation of continuous quantum variables16. Here we use stimulated parametric down-conversion to study entangled states of light that bridge the gap between discrete and macroscopic optical quantum correlations. We demonstrate experimentally the onset of laser-like action for entangled photons, through the creation and amplification of the spin-1/2 and spin-1 singlet states consisting of two and four photons, respectively. This entanglement structure holds great promise in quantum information science where there is a strong demand for entangled states of increasing complexity.

Suggested Citation

  • A. Lamas-Linares & J. C. Howell & D. Bouwmeester, 2001. "Stimulated emission of polarization-entangled photons," Nature, Nature, vol. 412(6850), pages 887-890, August.
    • Handle: RePEc:nat:nature:v:412:y:2001:i:6850:d:10.1038_35091014
    DOI: 10.1038/35091014
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    Cited by:

    1. O. A. Chuikin & Ya. S. Greenberg & A. A. Shtygashev & A. G. Moiseev, 2024. "Single-photon stimulated emission in waveguide quantum electrodynamics," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 97(10), pages 1-20, October.

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