Novel Experimental Platform to Realize One-dimensional Quantum Fluids

Abstract Templated porous materials like MCM-41 offer a scalable platform for studying one-dimensional quantum fluids due to their uniform structure. However, achieving true 1D helium behavior is limited by pore sizes typically larger than helium’s coherence length. Building on prior work using Ar preplating to reduce pore size and soften adsorption potentials, we propose a novel approach: preplating MCM-41 with cesium (Cs). Cs’s large atomic radius and non-wetting interaction with helium create an ideal confinement environment. Preliminary adsorption isotherms and small-angle X-ray scattering data confirm reduced pore radii, supporting the potential for realizing 1D 4 He quantum fluids in Cs-preplated MCM-41.