Physics – Quantum Physics
Scientific paper
1999-03-22
PhysRevA61:42304,2000
Physics
Quantum Physics
11 pages, 4 figures (REVTeX) Phys Rev A, 61, 42304 (2000)
Scientific paper
10.1103/PhysRevA.61.042304
We study the experimental realisation of quantum teleportation as performed by Bouwmeester {\em et al}. [Nature {\bf 390}, 575 (1997)] and the adjustments to it suggested by Braunstein and Kimble [Nature {\bf 394}, 841 (1998)]. These suggestions include the employment of a detector cascade and a relative slow-down of one of the two down-converters. We show that coincidences between photon-pairs from parametric down-conversion automatically probe the non-Poissonian structure of these sources. Furthermore, we find that detector cascading is of limited use, and that modifying the relative strengths of the down-conversion efficiencies will increase the time of the experiment to the order of weeks. Our analysis therefore points to the benefits of single-photon detectors in non-post-selected type experiments, a technology currently requiring roughly $6^{\circ}$K operating conditions.
Braunstein Samuel L.
Kok Pieter
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