Annihilation of an AB/BA interface pair in superfluid helium-3 as a simulation of cosmological brane interaction.
This study presents measurements of the transport of quasiparticle excitations in the B phase of superfluid 3He at temperatures below 0.2Tc. We find that creating and then removing a layer of A-phase superfluid leads to a measurable increase in the thermal impedance of the background B phase. This increase must be due to the survival of defects created as the AB and BA interfaces on either side of the A-phase layer annihilate. We speculate that a new type of defect may have been formed. The highly ordered A-B interface may be a good analogy for branes discussed in current cosmology. If so, these experiments may provide insight into how the annihilation of branes can lead to the formation of topological defects such as cosmic strings.
Department of Physics, University of Lancaster, Lancaster, UK.
D Ian
DI
Bradley
Shaun N
SN
Fisher
Anthony M
AM
Guénault
Richard P
RP
Haley
Juha
J
Kopu
Hazel
H
Martin
George R
GR
Pickett
John E
JE
Roberts
Viktor
V
Tsepelin