Observation of quantized circulation in superfluid B3

Phys. Rev. Lett. 66, 329 – Published 21 January 1991
J. C. Davis, J. D. Close, R. Zieve, and R. E. Packard


We report the first observation of quantized circulation in superfluid B3. The apparatus consists of a straight vibrating wire immersed in liquid He3, which is cooled by a rotating nuclear demagnetization cryostat. The experiment is carried out at about 250 μK. The superfluid at this temperature is in the ballistic quasiparticle regime. Circulation around the wire is found to be stable only when it takes on the values -h/2m3, 0, and +h/2m3, where h is Planck’s constant and m3 is the mass of the He3 atom. This experiment confirms that superfluid B3 is a Cooper-paired superfluid with a macroscopic quantum wave function.

DOI: http://dx.doi.org/10.1103/PhysRevLett.66.329

  • Received 19 November 1990
  • Published in the issue dated 21 January 1991

© 1991 The American Physical Society

Authors & Affiliations

J. C. Davis, J. D. Close, R. Zieve, and R. E. Packard

  • Department of Physics, University of California, Berkeley, California 94720


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