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Entangled photons from the biexciton cascade of quantum dots

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6 Author(s)
Young, R.J. ; Toshiba Research Europe Limited, 260 Cambridge Science Park, Milton Road, Cambridge CB4 0WE, United Kingdom ; Stevenson, R.M. ; Shields, A.J. ; Atkinson, P.
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Single InAs quantum dots embedded in a planar cavity, formed by mismatched sets of GaAs/AlAs distributed Bragg reflectors, can be a useful source of triggered polarization-entangled photon pairs. We demonstrate this with a fidelity exceeding 70% for the expected entangled state. Quantum dot based devices may therefore be of great use in quantum communications and quantum information processing.

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Journal of Applied Physics  (Volume:101 ,  Issue: 8 )