Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 61: Quanteninformation (Photonen und nichtklassisches Licht II)
Q 61.6: Vortrag
Freitag, 14. März 2008, 15:15–15:30, 1A
Experimental demonstration of anyonic statistics with multiphoton entanglement — •Witlef Wieczorek1,2, Jiannis Pachos3, Christian Schmid1,2, Nikolai Kiesel1,2, Reinhold Pohlner1,2, and Harald Weinfurter1,2 — 1Max-Planck-Institut für Quantenoptik, D-85748 Garching — 2Department für Physik, Ludwig-Maximilians-Universität München, D-80799 München — 3School of Physics & Astronomy, University of Leeds, Leeds LS2 9JT, UK
Particles in nature appear as two distinct types according to their statistics: bosons and fermions. However, if one considers only two spatial dimensions statistical behaviour ranging from bosonic to fermionic is found. Particles exhibiting such a behaviour are called anyons. Our experimental demonstration of their statistics is based on a particular two-dimensional model: the toric code proposed by Kitaev [1]. There, anyons arise as excitations that are generated by local operations. We show that for this model anyonic behaviour is revealed for as little as four qubits. This allowed us to experimentally demonstrate anyonic statistics in a quantum simulation using four-photon entanglement [2].
[1] A.Y. Kitaev, Ann. Phys. (N.Y.) 303, 2-30 (2003).
[2] J.K. Pachos et al., e-print arXiv: 0710.0895 (2007).