Phys. Rev. A 68, 062105 (2003) [5 pages]Correspondence between continuous-variable and discrete quantum systems of arbitrary dimensionsReceived 21 November 2002; published 9 December 2003 We establish a mapping between a continuous-variable (CV) quantum system and a discrete quantum system of arbitrary dimension. This opens up the general possibility to perform any quantum information task with a CV system as if it were a discrete system. The Einstein-Podolsky-Rosen state is mapped onto the maximally entangled state in any finite-dimensional Hilbert space and thus can be considered as a universal resource of entanglement. An explicit example of the map and a proposal for its experimental realization are discussed. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.68.062105
DOI:
10.1103/PhysRevA.68.062105
PACS:
03.65.Ud, 03.67.-a, 03.65.-w
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