The European Physical Journal B - Condensed Matter and Complex Systems

, Volume 24, Issue 4, pp 431–435

Phase oscillations in superfluid 3He-B  weak links

  • A. Smerzi
  • S. Raghavan
  • S. Fantoni
  • S.R. Shenoy

DOI: 10.1007/s10051-001-8695-0

Cite this article as:
Smerzi, A., Raghavan, S., Fantoni, S. et al. Eur. Phys. J. B (2001) 24: 431. doi:10.1007/s10051-001-8695-0

Abstract:

Oscillations in quantum phase about a mean value of π, observed across micropores connecting two 3He-B baths, are explained in a Ginzburg-Landau phenomenology. The dynamics arises from the Josephson phase relation,the interbath continuity equation, and helium boundary conditions. The pores are shown to act as Josephson tunnel junctions, and the dynamic variables are the inter bath phase difference and fractional difference in superfluid density at micropores. The system maps onto a non-rigid, momentum-shortened pendulum, with inverted-orientation oscillations about a vertical tilt angle φ = π, and other modes are predicted.

PACS. 03.75.Fi Phase coherent atomic ensembles; quantum condensation phenomena – 67.57.-z Superfluid phase of liquid 3He – 74.50.+r Proximity effects, weak links, tunneling phenomena, and Josephson effects

Copyright information

© EDP Sciences, Springer-Verlag 2001

Authors and Affiliations

  • A. Smerzi
    • 1
  • S. Raghavan
    • 2
  • S. Fantoni
    • 1
  • S.R. Shenoy
    • 2
  1. 1.Istituto Nazionale di Fisica della Materia and International School for Advanced Studies, 34014, Trieste, ItalyIT
  2. 2.Abdus Salam International Center for Theoretical Physics, 34100, Trieste, ItalyIT
  3. 3.Rochester Theory Center for Optical Science & Engineering, Department of Physics & Astronomy, University of Rochester, Rochester NY 14627, USAUS