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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Macroscopic quantum tunnelling of vortices in He II. / Hendry, P. C.; Lawson, N. Stuart; McClintock, Peter V. E. et al.
In: Physical review letters, Vol. 60, No. 7, 15.02.1988, p. 604-607.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Macroscopic quantum tunnelling of vortices in He II.
AU - Hendry, P. C.
AU - Lawson, N. Stuart
AU - McClintock, Peter V. E.
AU - Williams, Charles D. H.
AU - Bowley, R. M.
PY - 1988/2/15
Y1 - 1988/2/15
N2 - Experimental evidence is presented showing that the creation of vortices in He II involves macroscopic quantum tunneling through, or thermal activation over, a potential-energy barrier E. The investigations, based on measurements of the rate at which negative ions create vortex rings in the isotopically pure superfluid within the temperature range 50 < T < 500 mK, have yielded a barrier height of E/kB = 3.1 ± 0.1 K, in excellent agreement with the theoretical value predicted by Muirhead, Vinen, and Donnelly.
AB - Experimental evidence is presented showing that the creation of vortices in He II involves macroscopic quantum tunneling through, or thermal activation over, a potential-energy barrier E. The investigations, based on measurements of the rate at which negative ions create vortex rings in the isotopically pure superfluid within the temperature range 50 < T < 500 mK, have yielded a barrier height of E/kB = 3.1 ± 0.1 K, in excellent agreement with the theoretical value predicted by Muirhead, Vinen, and Donnelly.
U2 - 10.1103/PhysRevLett.60.604
DO - 10.1103/PhysRevLett.60.604
M3 - Journal article
VL - 60
SP - 604
EP - 607
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 7
ER -