Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 68: Quantum information: Photons and nonclassical light II
Q 68.8: Vortrag
Freitag, 22. März 2013, 15:45–16:00, F 142
Efficient Reconstruction of Qudit Entangled States — •Daniel L. Richart1,2, Christian Schwemmer1,2, 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
Qudit states offer significant advantages with respect to qubit states regarding their application in the field of quantum communication and computation. However, the measurement effort necessary to tomographically reconstruct their quantum states scales with 4log(d)/log(2) with d denoting the dimension of the qudit state. Here, we present experimental results on the efficient tomographic reconstruction of qudit entangled states with dimensions up to 2x8 using the energy-time degree of freedom [1,2]. Two different methods based on low rank quantum state tomography [3] and on correlation complementarity [4] are compared regarding their efficiency.
[1] J.D. Franson et al., PRL 62, 2205 (1989) [2] D. Richart et al., Appl. Phys. B 106, 543 (2012) [3] D. Gross et al., PRL 105 150401 (2010) [4] W. Laskowski et al., PRL 108, 240501 (2012)