Purifying GHZ States Using Degenerate Quantum Codes

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dc.creatorHo, K. H.
dc.creatorChau, H. F.
dc.date2008-03-11
dc.date2008-08-15
dc.date.accessioned2026-07-07T09:56:36Z
dc.date.available2026-07-07T09:56:36Z
dc.descriptionDegenerate quantum codes are codes that do not reveal the complete error syndrome. Their ability to conceal the complete error syndrome makes them powerful resources in certain quantum information processing tasks. In particular, the most error-tolerant way to purify depolarized Bell states using one-way communication known to date involves degenerate quantum codes. Here we study three closely related purification schemes for depolarized GHZ states shared among $m \geq 3$ players by means of degenerate quantum codes and one-way classical communications. We find that our schemes tolerate more noise than all other one-way schemes known to date, further demonstrating the effectiveness of degenerate quantum codes in quantum information processing.
dc.descriptionSignificantly revised with a few new results added, 33 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0803.1532
dc.identifierhttp://arxiv.org/abs/0803.1532
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167030
dc.subjectQuantum Physics
dc.titlePurifying GHZ States Using Degenerate Quantum Codes
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