Titel: Single ion – single photon interactions

Abstract: Controlled interaction between single atoms and single photons is a key tool in quantum networking, required to implement, for example, a quantum repeater. I will describe recent experiments where single trapped ions emit single-mode coupled, bandwidth-tunable single photons at high rate [1], and where single ions interact with single photons from a SPDC photon pair source. In the first experiment, another ion at ~1m distance ion absorbs the single emitted photons. In the second experiment, absorption is heralded by the photon's entangled partner [2]. Detection of coincidences in different bases reveals the entanglement of the photons [3].

[1]  M. Almendors et al., Phys. Rev. Lett. 103, 213601 (2009)
[2]  N. Piro et al., Nature Physics 7, 17 (2011).
[3]  J. Huwer et al., arXiv:1111.1085