dorsal/arxiv
View SchemaImproved fidelity of triggered entangled photons from single quantum dots
| Authors | Robert J. Young, R. Mark Stevenson, Paola Atkinson, Ken Cooper, David A. Ritchie, Andrew J. Shields |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0601187 |
| URL | https://arxiv.org/abs/quant-ph/0601187 |
| DOI | 10.1088/1367-2630/8/2/029 |
| Journal | New J. Phys. 8, 29 (2006) |
Abstract
We demonstrate the on-demand emission of polarisation-entangled photon pairs from the biexciton cascade of a single InAs quantum dot embedded in a GaAs/AlAs planar microcavity. Improvements in the sample design blue shifts the wetting layer to reduce the contribution of background light in the measurements. Results presented show that >70% of the detected photon pairs are entangled. The high fidelity of the (|HxxHx>+|VxxVx>)/2^0.5 state that we determine is sufficient to satisfy numerous tests for entanglement. The improved quality of entanglement represents a significant step towards the realisation of a practical quantum dot source compatible with applications in quantum information.
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"abstract": "We demonstrate the on-demand emission of polarisation-entangled photon pairs\nfrom the biexciton cascade of a single InAs quantum dot embedded in a GaAs/AlAs\nplanar microcavity. Improvements in the sample design blue shifts the wetting\nlayer to reduce the contribution of background light in the measurements.\nResults presented show that \u003e70% of the detected photon pairs are entangled.\nThe high fidelity of the (|HxxHx\u003e+|VxxVx\u003e)/2^0.5 state that we determine is\nsufficient to satisfy numerous tests for entanglement. The improved quality of\nentanglement represents a significant step towards the realisation of a\npractical quantum dot source compatible with applications in quantum\ninformation.",
"arxiv_id": "quant-ph/0601187",
"authors": [
"Robert J. Young",
"R. Mark Stevenson",
"Paola Atkinson",
"Ken Cooper",
"David A. Ritchie",
"Andrew J. Shields"
],
"categories": [
"quant-ph",
"cond-mat.other"
],
"doi": "10.1088/1367-2630/8/2/029",
"journal_ref": "New J. Phys. 8, 29 (2006)",
"title": "Improved fidelity of triggered entangled photons from single quantum dots",
"url": "https://arxiv.org/abs/quant-ph/0601187"
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