A New Approach to Excited States in 4He: Rotons and Vortices
The shadow wave function has been extensively used to describe quantum solids and liquids.1,2 The good results so far obtained for the ground state properties of a system of 4He atoms have encouraged us to apply this same formalism in more complex situations. In this paper we investigate the elementary excitation spectrum of liquid 4He and nonuniform states of this system with a vortex line.
KeywordsVortex Anisotropy Helium Vorticity
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