Hannover 2016 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 58: Poster: Quantum Optics and Photonics IV
Q 58.24: Poster
Thursday, March 3, 2016, 16:30–19:00, Empore Lichthof
Ion-ion entanglement with large numerical aperture optics — •Daniel Higginbottom1,2, Gabriel Araneda2, Lukáš Slodička2,3, Lukas Lachman3, Radim Filip3, Yves Colombe2, and Rainer Blatt2 — 1ANU, Australia — 2Universität Innsbruck, Österreich — 3Palacký University, Czech Republic
We trap short strings of ions at the focus of large numerical aperture optics as a means of generating quantum optical fields and ion-ion entanglement. We generate single photon Fock states and demonstrate their purity by measuring violations of a non-Gaussian field witness [1]. We then entangle two trapped ions with a single-photon herald by indistinguishably coupling the ions to a single detection mode [2]. Parity measurements characterize the bipartite entanglement and we describe an additional entanglement signature measured by scattering a second photon from the entangled state. The collection efficiency of the lenses used in these experiments limits the single-photon source efficiency and the entanglement fidelity and generation rate. We present the fabrication and characterization of hemispheric mirrors for stronger atom-light coupling and outline how such a mirror may be used to enhance or suppress the spontaneous emission of an ion trapped at the mirror’s centre of curvature [3].
[1] R. Filip, L. Mišta, Phys. Rev. Lett. 106, 200401 (2011). [2] L. Slodička, G. Hétet, N. Röck, P. Schindler, M. Hennrich, R. Blatt, Phys. Rev. Lett. 110, 083603 (2013). [3] G. Hétet, L. Slodička, A. Glätzle, M. Hennrich, R. Blatt, Phys. Rev. A 82, 63812 (2010).