Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Poster – Quantum Technologies III

Q 66.13: Poster

Thursday, March 5, 2026, 17:00–19:00, Philo 2. OG

High Frequency Ion-Photon Interfaces for Distributed Quantum Computing — •Lasse Jens Irrgang, Luca Graf, Cathérine Matthies, Hannah Koeth, Tuncay Ulaş, Rikahv Shah, and Ralf Riedinger — Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany

Decades of excessive research have proven the key towards a quantum advantage of quantum computing compared to classical computers is the scalability of the quantum processor. In analogy to classical super computing clusters we propose a network of small interconnected trapped-ion-based quantum processors to achieve flexibly scalable quantum computing.

In detail, a fibre-based Fabry-Pérot cavity integrated in an ion-trap provides an efficient ion-photon interface. This enables entanglement of ion-qubits in spatially separated traps at a high frequency, and therefore distributed computing in a network of ion-based quantum processors.

Being per se platform-independent, the concept is firstly demonstrated connecting a room-temperature blade trap and a cryogenic blade trap. A novel blade-integrated design of the fibre-cavity ensures plenty of free-space access for cooling and operation lasers. To cope with accumulating charges in the dielectric glass-fibres, disturbing the trapping field, an in-house designed conductive coating applied to the fibres circumvents these effects.

Keywords: Ion Trap; Ion-Photon Interface; Distributed Quantum Computing; Fiber-Cavity