Maxon and roton measurements in nanoconfined He4
نویسندگان
چکیده
منابع مشابه
Roton-maxon excitation spectrum of Bose condensates in a shaken optical lattice.
We present experimental evidence showing that an interacting Bose condensate in a shaken optical lattice develops a roton-maxon excitation spectrum, a feature normally associated with superfluid helium. The roton-maxon feature originates from the double-well dispersion in the shaken lattice, and can be controlled by both the atomic interaction and the lattice modulation amplitude. We determine ...
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The nonlocal nonlinear Schrodinger equation is used to analyze the superfluid flow around an impurity. The differences ̈ between the processes of vortex nucleation and roton creation are elucidated. It is argued that vortices are nucleated when the velocity around the ion exceeds the velocity of sound. q 2000 Elsevier Science B.V. All rights reserved. PACS: 67.40.Vs; 67.55; 02.60; 05.45.-a A hal...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2018
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.97.184511