Complementarity reveals bound entanglement of two twisted photons

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F13%3A00072596" target="_blank" >RIV/00216224:14310/13:00072596 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1367-2630/15/8/083036" target="_blank" >http://dx.doi.org/10.1088/1367-2630/15/8/083036</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1367-2630/15/8/083036" target="_blank" >10.1088/1367-2630/15/8/083036</a>

Result language
angličtina
Original language name
Complementarity reveals bound entanglement of two twisted photons
Original language description
We demonstrate the detection of bipartite bound entanglement as predicted by the Horodecki?s in 1998. Bound entangled states, being heavily mixed entangled quantum states, can be produced by incoherent addition of pure entangled states. Until 1998 it wasthought that such mixing could always be reversed by entanglement distillation; however, this turned out to be impossible for bound entangled states. The purest form of bound entanglement is that of only two particles, which requires higher-dimensional(d > 2) quantum systems. We realize this using photon qutrit (d = 3) pairs produced by spontaneous parametric downconversion, that are entangled in the orbital angular momentum degrees of freedom, which is scalable to high dimensions. Entanglement ofthe photons is confirmed via a ´maximum complementarity protocol´. This conceptually simple protocol requires only maximized complementary of measurement bases; we show that it can also detect bound entanglement.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BE - Theoretical physics
OECD FORD branch
—

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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