Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 48: Poster – Quantum Optics, Technologies, and Optomechanics
Q 48.13: Poster
Wednesday, March 12, 2025, 17:00–19:00, Tent
Developing a database for UHV and XUHV suitable materials for use in quantum technologies — •Vanessa Galbierz1, Pascal Engelhardt1, 2, Simone Callegari1, 3, Constantin Nauk1, 2, Benjamin Kraus1, and Piet Schmidt1, 2 — 1Physikalisch Technische Bundesanstalt, 38116 Braunschweig, Germany — 2Leibniz University Hannover, 30167 Hannover, Germany — 3currently with: VAT Vakuumventile AG, 9469 Haag, Switzerland
The lifetime and coherence time of atomic quantum systems is often limited by the achievable vacuum background gas pressure. Room-temperature vacuum systems reaching 10e-11 mbar can be easily built using mostly standard, off-the-shelf parts. However, this typically changes when the system is equipped with all components for a working in-vacuum experiment, such as ion-based optical clocks and quantum computers. Introduced materials can severely limit the achievable pressure. In addition, the outgassing behavior of new types of materials and parts produced with innovative methods, such as additive manufacturing, is often not yet known. We present a strategy to identify, measure and classify potentially suitable materials and their outgassing behavior to assess their suitability for use in UHV and XUHV. In this context, we introduce our two vacuum test benches, explain the measurement and evaluation methods used and show the first results of an emerging material database, which aims to provide standardized outgassing data for materials of different categories.
Keywords: UHV; XUHV; Advanced Vacuum Technology; vacuum background; quantum computers