Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.38: Poster
Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal
Increasing photon collection efficiency for faster remote entanglement of atoms — •Timon Hummel1, Robert Garthoff1, Kai Redeker1, Tim van Leent1, Wenjamin Rosenfeld1,2, and Harald Weinfurter1,2 — 1Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching
Entanglement of atomic quantum memories separated by large distances will be a key resource for future applications in quantum communication including the quantum repeater and quantum networks. Currently, the efficiency of generation of remote entanglement in schemes based on entanglement swapping is limited by the efficiency of collecting photons from the quantum memory.
Here we present the experimental details on our route for improvement of the photon collection efficiency from a quantum memory based on single trapped atoms. Using a custom designed microscope objective with a high numerical aperture we estimate an improvement of the remote entanglement rate by one order of magnitude relative to that achieved in our previous measurements [1].
[1] Phys. Rev. Lett. 119, 010402 (2017).