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SYDI: Symposium Dissertationspreis

SYDI 1: Dissertation Prize Symposium

SYDI 1.1: Hauptvortrag

Dienstag, 3. März 2009, 10:30–11:00, VMP 8 HS

Experimental manipulation of atoms and photons: the application in quantum information processing — •Yu-Ao Chen — Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany

Quantum information science and atom optics are among the most active fields in modern physics. In recent years, within the frame of quantum repeaters, which solves the formidable obstacles of photon loss and decoherence in long-distance quantum communication, many theoretical efforts have been made to combine these two fields. On the one hand, the experimental technique multi-photon entanglement is further developed to study fundamental issues in quantum mechanics, remarkable applications to quantum communication and quantum computation. On the other hand, utilizing the interaction between laser pulses and atomic ensembles we theoretically and experimentally investigate the potentials of atomic ensembles in the gas phase to build quantum memory for large scale quantum information processing. By combining the techniques of quantum memory and multi-photon interference, we experimentally achieved quantum teleportation between photonic and atomic qubits, efficient entanglement generation via classical feed-forward and further demonstrated a proof-in-principle quantum repeater. The techniques that are being developed will lay the basis for future large scale quantum information processing with atoms and photons.