Quantum 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
THU: Thursday Contributed Sessions
THU 13: Poster Session: Applications
THU 13.14: Poster
Thursday, September 11, 2025, 16:30–18:30, ZHG Foyer 1. OG
High Frequency Ion-Photon Interfaces for Distributed Quantum Computing — •Lasse Jens Irrgang1, Luca Graf1, Tuncay Ulaş1, Rikhav Shah1,2, and Ralf Riedinger1,2 — 1Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, 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: Trapped Ion; Ion-Photon Interface; Distributed Quantum Computing; Fiber-Cavity