Many-body structure of quantum vortices in thin 4He films

M. Saarela, F. V. Kusmartsev

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We propose a microscopic theory of quantum vortices in two-dimensional 4He, applicable to thin superfluid 4He films. The theory describes the vortex core and reproduces the classical logarithmic behavior at large distances. The single vortex is treated as a quasiparticle. We calculate the energy needed to create a single vortex, the vortex inertial mass, the microscopic interaction between vortices and the binding energy of the vortex-antivortex pair as a function of density at zero temperature. At 4He densities less than 0.037 Å-2 the binding energy of the vortex-antivortex pair becomes negative, indicating an instability for the creation of a novel state.

Original languageBritish English
Pages (from-to)317-323
Number of pages7
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume202
Issue number4
DOIs
StatePublished - 26 Jun 1995

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