Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 24: Quanteninformation: Repeater und Speicher

Q 24.4: Talk

Tuesday, March 13, 2012, 11:30–11:45, V7.02

Quantum Interference of Photons from Two Independent Single-Atom Quantum Memories — •Christian Nölleke, Carolin Hahn, Andreas Reiserer, Andreas Neuzner, Eden Figueroa, Stephan Ritter, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching

Neutral atoms trapped in optical cavities are capable of fully controlled single photon generation and storage, making them universal nodes in large-scale quantum networks. One way to distribute quantum information among the entire network is to make use of interference between photons from different nodes. Fundamentally, two indistinguishable single photons combined on a beam splitter will coalesce and leave the beam splitter from the same output port. This quantum interference effect is at the heart of quantum information protocols like linear optical quantum-computing, generation of remote-entanglement and quantum teleportation. We demonstrate interference of single photons emitted from two independently operated atom-cavity systems at remote locations. We characterize the two-photon interference in a time-resolved manner and present prospects towards teleportation of quantum states between neutral atoms.