Phys. Rev. Lett. 102, 131101 (2009) [4 pages]Dynamics of Quantum Vorticity in a Random PotentialReceived 11 July 2008; revised 23 December 2008; published 3 April 2009 I study the dynamics of a superfluid vortex in a random potential, as in the inner crust of a neutron star. Below a critical flow velocity of the ambient superfluid, a vortex is effectively immobilized by lattice forces even in the limit of zero dissipation. Low-velocity, translatory motion is not dynamically possible, a result with important implications for understanding neutron star precession and the dynamical properties of superfluid nuclear matter. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.131101
DOI:
10.1103/PhysRevLett.102.131101
PACS:
97.60.Jd, 26.60.−c, 47.37.+q, 97.60.Gb
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