Critical Velocity of Vortex Nucleation in Rotating Superfluid3He-A
نویسندگان
چکیده
منابع مشابه
Vortex nucleation in superfluid
W F Vinen suggested in 1961 that the creation of quantized vortex line in superfluid 4He is impeded by an energy barrier. Measurements of the rate ν at which negative ions nucleate vortices in isotopically pure 4He have vindicated this idea. Barrier heights derived from the measured temperature dependence of ν are in good agreement with values calculated by Muirhead, Vinen and Donnelly (MVD) on...
متن کاملVortex Nucleation and Array Formation in a Rotating Bose-Einstein Condensate
We study the dynamics of vortex lattice formation of a rotating trapped Bose-Einstein condensate by numerically solving the two-dimensional GrossPitaevskii equation, and find that the condensate undergoes elliptic deformation, followed by unstable surface-mode excitations before forming a quantized vortex lattice. The dependence of the number of vortices on the rotation frequency is obtained. P...
متن کاملStationary states of a rotating Bose-Einstein condensate: routes to vortex nucleation.
Using a focused laser beam we stir a 87Rb Bose-Einstein condensate confined in a magnetic trap. We observe that the steady states of the condensate correspond to an elliptic cloud, stationary in the rotating frame. These steady states depend nonlinearly on the stirring parameters (amplitude and frequency), and various solutions can be reached experimentally depending on the path followed in thi...
متن کاملBose-Einstein condensation from a rotating thermal cloud: Vortex nucleation and lattice formation
We develop a stochastic Gross-Pitaveskii theory suitable for the study of Bose-Einstein condensation in a rotating dilute Bose gas. The theory is used to model the dynamical and equilibrium properties of a rapidly rotating Bose gas quenched through the critical point for condensation, as in the experiment of Haljan et al. #Phys. Rev. Lett. 87, 210403 !2001"$. In contrast to stirring a vortex-fr...
متن کاملSuperfluid Vortex Nucleation
In an earlier paper 2] the author introduced a nonlinear Schrr odinger model for superruid that captures the process of mutual friction between the super-uid and normal uid components of helium II. Topological defects in the solution of this equation are identiied as superruid vortices, and in that paper, an asymp-totic dynamics for the vortices was derived in the case they are widely separated...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1997
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.79.5058