Jan 1, 2005
The right spin for a neutrino superfluid
Right-handed neutrinos, with the intrinsic spin oriented in the direction of motion, have yet to be observed, but if they do exist then they could make neutrino superfluids possible. Joe Kapusta of the University of Minnesota has shown that such an exotic medium could arise because the right-handed particles could exchange Higgs bosons with the well known left-handed neutrinos and pair up to make bosons, which could then form a superfluid.
Kapusta points out that the condensation temperature would be well below the cosmic background temperature, so it would be quite a feat to make this superfluid. However, Kapusta also notes that a sufficiently advanced civilization might use pulses of neutrino superfluid for long-distance communications.
J I Kapusta 2004 Phys. Rev. Lett. 93 251801.
Compiled by Steve Reucroft and John Swain, Northeastern University.