Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Information: Atoms and Ions 1
Q 11.5: Vortrag
Montag, 14. März 2011, 15:45–16:00, BAR Schön
Entangling two single atoms at remote locations — •Julian Hofmann1, Norbert Ortegel1, Michael Krug1, Florian Henkel1, Wenjamin Rosenfeld1,2, Markus Weber1, and Harald Weinfurter1,2 — 1Department für Physik der LMU, München — 2Max-Planck Institut für Quantenoptik, Garching
Entanglement between distant atomic quantum memories is a key resource for future applications in quantum communication. Here we present our recent progress on establishing entanglement between two single Rb-87 atoms over a large distance.
For this purpose we have set up two independently operating atomic traps situated in two neighboring laboratories separated by 20 meter. On each side we capture a single neutral Rb-87 atom in an optical dipole trap and generate a spin-entangled state [1] between the atom and a photon. The emitted photons are collected with high-NA objectives into single-mode optical fibers and guided to the same 50-50 fiber beam-splitter where we observe their interference. This setup allows us to detect two of four maximally entangled Bell states, thereby projecting the two atoms into an entangled state.
Here we report the progress towards the verification of the entanglement between the two distant atoms.
[1] J. Volz, et al. Phys. Rev. Lett. 96, 030404 (2006).