Berlin 2014 – scientific programme
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SYQR: Symposium Quantum Repeater
SYQR 1: Flying/Stationary Qubit Conversion and Entanglement Generation
SYQR 1.2: Talk
Monday, March 17, 2014, 10:45–11:00, UDL HS2002
High-fidelity heralded photon-to-atom quantum state transfer — •Christoph Kurz, Michael Schug, Pascal Eich, Jan Huwer, Philipp Müller, and Jürgen Eschner — Experimentalphysik, Universität des Saarlandes, Saarbrücken, Germany
A promising platform for implementing a quantum network are atom-based quantum memories and processors, interconnected by photonic quantum channels. A crucial building block in this scenario is the conversion of quantum states between single photons and single atoms through controlled absorption [1, 2] and emission [3].
We present an interface for heralded photon-to-atom quantum state conversion [4], whereby the polarization state of a single photon is mapped onto the spin state of a single absorbing 40Ca+ ion with >95% average fidelity. A successful state-mapping event is heralded by a single emitted photon. We record >80 s−1 events out of 18,000 s−1 repetitions.
[1] N. Piro et al., Nat. Phys. 7, 17 (2011)
[2] J. Huwer et al., New J. Phys. 15, 025033 (2013)
[3] C. Kurz et al., New J. Phys. 15, 055005 (2013)
[4] N. Sangouard et al., New J. Phys. 15, 085004 (2013)