Experimental realization of one dimensional helium

Adrian Del Maestro (), Nathan S. Nichols, Timothy R. Prisk, Garfield Warren and Paul E. Sokol ()
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Adrian Del Maestro: University of Tennessee
Nathan S. Nichols: Data Science and Learning Division, Argonne National Laboratory
Timothy R. Prisk: California Institute of Technology
Garfield Warren: Indiana University
Paul E. Sokol: Indiana University

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract As the spatial dimension is lowered, locally stabilizing interactions are reduced, leading to the emergence of strongly fluctuating phases of matter without classical analogues. Here we report on the experimental observation of a one dimensional quantum liquid of 4He using nanoengineering by confining it within a porous material preplated with a noble gas to enhance dimensional reduction. The resulting excitations of the confined 4He are qualitatively different than bulk superfluid helium, and can be analyzed in terms of a mobile impurity allowing for the characterization of the emergent quantum liquid beyond the Luttinger liquid paradigm. The low dimensional helium system offers the possibility of tuning via pressure—from weakly interacting, all the way to the super Tonks-Girardeau gas of strongly interacting hard-core particles.

Date: 2022
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DOI: 10.1038/s41467-022-30752-3

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