Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 53: Quantum Information: Photons and Nonclassical Light 1
Q 53.1: Vortrag
Donnerstag, 17. März 2011, 14:30–14:45, SCH 251
Experimental Qudit Entanglement — •Daniel L. Richart1,2, Yvo Fischer1,2, Wieslaw Laskowski1,2,3, and Harald Weinfurter1,2 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str.1 D-85748 Garching, Germany — 2Ludwig-Maximilians-Universität, Schellingstr. 4, D-80797 München, Germany — 3Instytut Fizyki Teoretycznej i Astrofizyki, Uniwersytet Gdánski, PL-80-952 Gdánsk, Poland
Entangled qudits, i.e. entangled higher dimensional states, have been proven to offer potential applications in the field of quantum computation and communication, e.g. for the implementation of more efficient quantum gates and more secure Quantum Key Distribution schemes. We make use of a scalable scheme using unbalanced interferometers to encode energy-time entangled [1] qudits first on a 2x4 dimensional Hilbert space. We experimentally demonstrate entanglement between both ququats by performing a Bell test [2], and further characterize them by dimension and state witnesses. Potential applications in the field of quantum metrology are discussed.
[1] J.D. Franson et al., PRL 62, 2205 (1989) [2] Vertesi et al., PRL 104, 060401 (2010)