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Fermionic Superfluidity with Positive Scattering Length by Marcelis, Bout; Kokkelmans, Servaas is a scholarly article available to read on EtoBox.

What is Fermionic Superfluidity with Positive Scattering Length about?

Superfluidity in an ultracold Fermi gas is usually associated with either a negative scattering length, or the presence of a two-body bound state. We show that none of these ingredients is necessary to achieve superfluidity. Using a narrow Feshbach resonance with strong repulsive background interactions, the effective interactions can be repulsive for small energies and attractive for energies around the Fermi energy, similar to the effective interactions between electrons in a metallic superconductor. This can result in BCS-type superfluidity while the scattering length is positive.

Author

Marcelis, Bout; Kokkelmans, Servaas

Published

2005

Language

EN