München 2004 – scientific programme
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Q: Quantenoptik und Photonik
Q 39: Quanteninformation III
Q 39.2: Talk
Thursday, March 25, 2004, 16:45–17:00, HS 101
Experimental demonstration of quantum telecloning — •Sascha Gaertner1,2, Julia Lau1,2, Nikolai Kiesel1,2, Mohamed Bourennane1,2, Christian Kurtsiefer1, and Harald Weinfurter1,2 — 1Max-Planck-Institut fuer Quantenoptik (MPQ), Hans-Kopfermann-Str.1, 85748 Garching — 2Ludwig-Maximilians-Universitaet (LMU) Muenchen, Schellingstrasse 4/III, 80799 Munich
Quantum telecloning combines quantum teleportation and optimal quantum cloning [1] in order to communicate an initial quantum state to two receivers simultaneously. Here we show the experimental implementation of quantum telecloning using four photon entanglement. The four photon polarisation entangled state is obtained directly from parametric down-conversion [2], while the input state is realized by the polarisation of a strongly attenuated coherent beam. We demonstrate the realisation of quantum telecloning using three different input states and determine the density matrix of the two cloned states for one of these input states using quantum state tomography.
[1] M. Murao, D. Jonathan, M.B. Plenio and V. Vedral, PRA 59, 156 (1998).
[2] H. Weinfurter and M. Zukowski, PRA 64, 010102-1 (2001).