Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology
Q 16.24: Poster
Monday, March 17, 2014, 16:30–18:30, Spree-Palais
Enhanced state–mapping using ion crystals — •Konstantin Friebe1, Bernardo Casabone1, Birgit Brandstätter1, Klemens Schüppert1, Tracy Northup1, and Rainer Blatt1,2 — 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Österreich — 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Otto-Hittmair-Platz 1, 6020 Innsbruck, Österreich
We investigate the use of a trapped ion crystal in an optical cavity as a node for quantum networks. The electronic state of a single ion can be mapped onto the polarization state of a cavity photon [1]. To enhance the fidelity of this process, the logical qubit can be encoded across two or more ions. For an entangled two-ion crystal, an enhanced coupling of the logical qubit to the cavity mode by a factor of √2 is predicted. This protocol strongly relies on the control of the coupling of both ions to the cavity mode [2]. We describe an experimental implementation with trapped calcium ions and future plans, exploring the possibilities offered by ion crystals in cavities.
[1] Stute et al., Nat. Phot. 7, 219 (2013)
[2] Casabone et al., Phys. Rev. Lett. 111, 100505 (2013)