Remote preparation of arbitrary ensembles and quantum bit commitment

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dc.creatorHalvorson, Hans
dc.date2003-10-01
dc.date2004-03-18
dc.date.accessioned2026-07-07T06:07:57Z
dc.date.available2026-07-07T06:07:57Z
dc.descriptionThe Hughston-Jozsa-Wootters theorem shows that any finite ensemble of quantum states can be prepared "at a distance", and it has been used to demonstrate the insecurity of all bit commitment protocols based on finite quantum systems without superselection rules. In this paper, we prove a generalized HJW theorem for arbitrary ensembles of states on a C*-algebra. We then use this result to demonstrate the insecurity of bit commitment protocols based on infinite quantum systems, and quantum systems with Abelian superselection rules.
dc.description21 pages, LaTeX. Version 2: Proofs expanded and made more self-contained; added an example of a bit commitment protocol with continuous ensembles
dc.identifierhttps://arxiv.org/abs/quant-ph/0310001
dc.identifierhttp://arxiv.org/abs/quant-ph/0310001
dc.identifierJ.Math.Phys. 45 (2004) 4920-4931
dc.identifierdoi:10.1063/1.1812827
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91476
dc.subjectQuantum Physics
dc.subjectMathematical Physics
dc.subjectOperator Algebras
dc.titleRemote preparation of arbitrary ensembles and quantum bit commitment
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