Luogo: Department of Physics, Seminar Room Fisica Teorica - 2nd floor
(University of Cambridge)
The contact interaction found in ultracold atomic gases leads to pathological behaviour in the many-body wave function when two particles coalesce. We propose a family of pseudopotentials that reproduce the scattering phase shifts of the contact interaction up to a hundred times more accurately than the square well potential, and have a smooth profile that reduces computational cost a thousand times. We apply the pseudopotential to the Stoner Hamiltonian, showing that the system undergoes a second order transition and displays p-wave superconducting order.
prof. Stefano Giorgini