Research output: Contribution to Journal/Magazine › Journal article › peer-review
Measuring the decay of vorticity in superfluid He-3-B : a progress report. / Bradley, Ian; Fisher, SN; Hayes, WM et al.
In: Journal of Low Temperature Physics, Vol. 113, No. 5-6, 12.1998, p. 687-692.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Measuring the decay of vorticity in superfluid He-3-B
T2 - International Symposium on Quantum Fluids and Solids (QFS98)
AU - Bradley, Ian
AU - Fisher, SN
AU - Hayes, WM
AU - Bradley, Ian
PY - 1998/12
Y1 - 1998/12
N2 - Recent measurements in superfluid He-3-B have been interpreted as evidence in support of the Kibble-Zurek hypothesis for the formation of defects in the early Universe. The superfluid He-3 analogue to the cosmic string is the quantum vortex:. We report here the preliminary attempts to detect the heat evolution from the decay of this vorticity in superfluid He-3-B at temperatures down to similar to 110 mu K. We produce vorticity by neutron irradiation of a small superfluid He-3-B sample and attempt to measure the heat released as the vorticity decays. We detect a long time scale heart release and find that the lifetime of this decay varies inversely proportional to the quasiparticle excitation number density in the superfluid. However, we have yet to be convinced that this heat is from the decay of vorticity.
AB - Recent measurements in superfluid He-3-B have been interpreted as evidence in support of the Kibble-Zurek hypothesis for the formation of defects in the early Universe. The superfluid He-3 analogue to the cosmic string is the quantum vortex:. We report here the preliminary attempts to detect the heat evolution from the decay of this vorticity in superfluid He-3-B at temperatures down to similar to 110 mu K. We produce vorticity by neutron irradiation of a small superfluid He-3-B sample and attempt to measure the heat released as the vorticity decays. We detect a long time scale heart release and find that the lifetime of this decay varies inversely proportional to the quasiparticle excitation number density in the superfluid. However, we have yet to be convinced that this heat is from the decay of vorticity.
KW - DETECTOR
U2 - 10.1023/A:1022549327011
DO - 10.1023/A:1022549327011
M3 - Journal article
VL - 113
SP - 687
EP - 692
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 5-6
Y2 - 9 June 1998 through 14 June 1998
ER -