dorsal/arxiv
View SchemaQuantum entanglement enhances the capacity of bosonic channels with memory
| Authors | Nicolas J. Cerf, Julien Clavareau, Chiara Macchiavello, Jeremie Roland |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0412089 |
| URL | https://arxiv.org/abs/quant-ph/0412089 |
| DOI | 10.1103/PhysRevA.72.042330 |
| Journal | Phys. Rev. A 72, 042330 (2005) |
Abstract
The bosonic quantum channels have recently attracted a growing interest, motivated by the hope that they open a tractable approach to the generally hard problem of evaluating quantum channel capacities. These studies, however, have always been restricted to memoryless channels. Here, it is shown that the classical capacity of a bosonic Gaussian channel with memory can be significantly enhanced if entangled symbols are used instead of product symbols. For example, the capacity of a photonic channel with 70%-correlated thermal noise of one third the shot noise is enhanced by about 11% when using 3.8-dB entangled light with a modulation variance equal to the shot noise.
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"abstract": "The bosonic quantum channels have recently attracted a growing interest,\nmotivated by the hope that they open a tractable approach to the generally hard\nproblem of evaluating quantum channel capacities. These studies, however, have\nalways been restricted to memoryless channels. Here, it is shown that the\nclassical capacity of a bosonic Gaussian channel with memory can be\nsignificantly enhanced if entangled symbols are used instead of product\nsymbols. For example, the capacity of a photonic channel with 70%-correlated\nthermal noise of one third the shot noise is enhanced by about 11% when using\n3.8-dB entangled light with a modulation variance equal to the shot noise.",
"arxiv_id": "quant-ph/0412089",
"authors": [
"Nicolas J. Cerf",
"Julien Clavareau",
"Chiara Macchiavello",
"Jeremie Roland"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.042330",
"journal_ref": "Phys. Rev. A 72, 042330 (2005)",
"title": "Quantum entanglement enhances the capacity of bosonic channels with memory",
"url": "https://arxiv.org/abs/quant-ph/0412089"
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