Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 67: Poster – Quantum Information

Q 67.11: Poster

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

A Cryogenic Tweezer-Array Platform for Entangling Ytterbium-171 Nuclear Spins via the Optical Clock Transition — •Mohammad Soltani¹, Julian Feiler^{1, 2}, Konrad Koenigsmann³, Jin Yang³, Max Hachmann^{1, 2}, and Peter Schauss^{1, 2, 3} — ¹Institute for Quantum Physics, University of Hamburg, Hamburg, Germany — ²The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany — ³Department of Physics, University of Virginia, Charlottesville, USA

Neutral atom platforms based on ytterbium have emerged as a promising architecture for quantum computing, particularly in scalable optical tweezer arrays that enable individual trapping and control of atoms. Specifically, the fermionic isotope Yb-171, with its nuclear spin of I = 1/2, provides a robust and natural qubit implementation.

In our project, we aim at realizing large-scale robust entanglement in the nuclear spin of ytterbium atoms trapped in a tweezer array with a cryogenic shield. For our entanglement scheme, we plan to rely on spin-exchange in combination with coherent driving of the clock transition. Therefore, we need a highly stable laser system to address the clock transition in Yb-171.

We will report on the progress in setting up the experiment and on our efforts to stabilize the clock laser to an ultra-stable reference cavity. To characterize the stability and accuracy of the laser system, we are preparing a comparison to other clock lasers at the Institute for Quantum Physics in Hamburg.

Keywords: Quantum Computing; Optical Tweezer Arrays; Cryostat; Clock Transition; Modulation Transfer Spectroscopy