paper

On Bell measurements for teleportation

arXiv:quant-ph/9809063 · doi:10.1103/PhysRevA.59.3295

Abstract

In this paper we investigate the possibility to make complete Bell measurements on a product Hilbert space of two two-level bosonic systems. We restrict our tools to linear elements, like beam splitters and phase shifters, delay lines and electronically switched linear elements, photo-detectors, and auxiliary bosons. As a result we show that with these tools a never failing Bell measurement is impossible.

7 pages, 3 figures. Final version to appear in Phys.Rev. A

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