Dissipative Currents in Superfluid 3He Weak Links

Abstract

We calculate the current-pressure relation for pinholes connecting two volumes of bulk superfluid 3He-B. The theory of multiple Andreev reflections, adapted from superconducting weak links, leads to a nonlinear dependence of the dc current on pressure bias. In arrays of pinholes one has to take into account oscillations of the texture at the Josephson frequency. The associated radiation of spin waves from the junction leads to an additional dissipative current at small biases, in quantitative agreement with measurements.

4 pages, 3 figures; updated to the published version

References in corpus (6)

• AC JOSEPHSON EFFECT IN A SINGLE QUANTUM CHANNEL
• Distribution functions in non-equilibrium theory of superconductivity and Andreev spectroscopy in unconventional superconductors
• Theory of the pi state in 3He Josephson junctions
• Adiabatic Dynamics of Superconducting Quantum Point Contacts
• pi states in Josephson Junction between He-3-B
• Pinhole calculations of the Josephson effect in 3He-B

Cited by in corpus (4)

• Anderson's considerations on the flow of superfluid helium: some offshoots
• Spin wave radiation from vortices in ${}^3$He-B
• Square-well model for superconducting pair-potential
• Multiple Andreev Reflections in Weak Links of Superfluid 3He-B