Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.31: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Controlled photon generation and absorption in ion-cavity systems for quantum networks — •Maria Galli¹, Dario A. Fioretto¹, Konstantin Friebe¹, Yunfei Pu¹, Markus Teller¹, Klemens Schüppert¹, Viktor Messerer¹, Yueyang Zou¹, Rainer Blatt^1,2, and Tracy E. Northup¹ — ¹Universität Innsbruck, Institut für Experimentalphysik, Technikerstrasse 25, 6020 Innsbruck, Austria — ²Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, 6020 Innsbruck, Austria

The problem of scalability is an outstanding challenge in the field of quantum computing. One solution is to interconnect multiple computers and consider each computer as a node of a quantum network. Our implementation of such a quantum network node is an ion trap interfaced with a cavity. Here, the cavity has the role of efficiently collecting photons produced by ions in the network. Quantum information is encoded in those photons and thus transferred between the nodes. Our work focuses specifically on sending and receiving photons at the nodes. Those photons are generated via a lambda-type scheme known as a cavity-mediated Raman transition, in which a laser drive is applied to one branch of the lambda transition, and the cavity enhances the efficiency of photon emission and collection on the other branch. First, we show how manipulating the temporal intensity profile of the laser drive allows us to control the temporal wavepacket of the photon leaving the node; secondly, we present preliminary simulation results regarding the photon absorption process at the receiving node.