A New Microscopic Theory of Superfluidity at All Temperatures

L. E. Reichl

Pierre C. Hohenberg, Paul C. Martin

F.W. Cummings, James R. Johnston

Y. C. Yu

We show that a microscopic theory of superfluidity, based on the properties of the many-body spectrum of a superfluid, can explain naturally the temperature dependence of critical velocities and the long time decay of supercurrents.

Nikolay N. Bogolubov

Nicolai Gayle Nygaard, Georg M. Bruun, Charles W. Clark +1 more

The microscopic properties of a single vortex in a dilute superfluid Fermi gas at zero temperature are examined within the framework of self-consistent Bogoliubov-de Gennes theory. Using only physical parameters as input, we study the pair potential, the density, the energy, and the current distribution. Comparison of the numerical results with analytical expressions clearly indicates that the energy of the vortex is governed by the zero-temperature BCS coherence length.