https://doi.org/10.1007/s10051-001-8695-0
Phase oscillations in superfluid 3He-B weak links
1
Istituto Nazionale di Fisica della Materia and International School for Advanced Studies, 34014, Trieste, Italy
2
Abdus Salam International Center for Theoretical Physics, 34100, Trieste, Italy
3
Rochester Theory Center for Optical Science & Engineering, Department of Physics & Astronomy, University of Rochester, Rochester NY 14627, USA
Corresponding author: a smerzi@sissa.it
Received:
19
March
2001
Published online: 15 December 2001
Oscillations in quantum phase about a mean value of π,
observed across micropores connecting two 
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 
, 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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
