Quantum vortex-antivortex pairs in 4He films

M. Saarela, F. V. Kusmartsev

Research output: Contribution to journalArticlepeer-review


We propose a microscopic theory of quantum vortices in 4He films at zero temperature, and 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 4He densities less than 0.037 Å-2 the binding energy of the pair becomes negative, indicating an instability for the creation of a novel state. We discuss the microscopic scenario of the Berezinskiǐ-Kosterlitz-Thouless (BKT) phase transition.

Original languageBritish English
Pages (from-to)617-618
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberPART 1
StatePublished - 2 Feb 1994


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