dorsal/arxiv
View SchemaA fast and robust approach to long-distance quantum communication with atomic ensembles
| Authors | L. Jiang, J. M. Taylor, M. D. Lukin |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0609236 |
| URL | https://arxiv.org/abs/quant-ph/0609236 |
| DOI | 10.1103/PhysRevA.76.012301 |
| Journal | Phys. Rev. A 76, 012301 (2007) |
Abstract
Quantum repeaters create long-distance entanglement between quantum systems while overcoming difficulties such as the attenuation of single photons in a fiber. Recently, an implementation of a repeater protocol based on single qubits in atomic ensembles and linear optics has been proposed [Nature 414, 413 (2001)]. Motivated by rapid experimental progress towards implementing that protocol, here we develop a more efficient scheme compatible with active purification of arbitrary errors. Using similar resources as the earlier protocol, our approach intrinsically purifies leakage out of the logical subspace and all errors within the logical subspace, leading to greatly improved performance in the presence of experimental inefficiencies. Our analysis indicates that our scheme could generate approximately one pair per 3 minutes over 1280 km distance with fidelity (F>78%) sufficient to violate Bell's inequality.
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"abstract": "Quantum repeaters create long-distance entanglement between quantum systems\nwhile overcoming difficulties such as the attenuation of single photons in a\nfiber. Recently, an implementation of a repeater protocol based on single\nqubits in atomic ensembles and linear optics has been proposed [Nature 414, 413\n(2001)]. Motivated by rapid experimental progress towards implementing that\nprotocol, here we develop a more efficient scheme compatible with active\npurification of arbitrary errors. Using similar resources as the earlier\nprotocol, our approach intrinsically purifies leakage out of the logical\nsubspace and all errors within the logical subspace, leading to greatly\nimproved performance in the presence of experimental inefficiencies. Our\nanalysis indicates that our scheme could generate approximately one pair per 3\nminutes over 1280 km distance with fidelity (F\u003e78%) sufficient to violate\nBell\u0027s inequality.",
"arxiv_id": "quant-ph/0609236",
"authors": [
"L. Jiang",
"J. M. Taylor",
"M. D. Lukin"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.76.012301",
"journal_ref": "Phys. Rev. A 76, 012301 (2007)",
"title": "A fast and robust approach to long-distance quantum communication with atomic ensembles",
"url": "https://arxiv.org/abs/quant-ph/0609236"
},
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