September 15, 2014 to October 10, 2014
Nordita, Stockholm
Europe/Stockholm timezone

Low and High-Energy Excitations of the Unitary Fermi Gas

Sep 16, 2014, 9:00 AM
40m
FP41 (Nordita, Stockholm)

FP41

Nordita, Stockholm

Speaker

Joseph Carlson

Description

I describe the use of Quantum Monte Carlo Methods to study low- and high-energy excitations of the Unitary Fermi Gas. We have employed Auxiliary Field Quantum Monte Carlo methods to study this regime of strong pairing in the inhomogeneous gas. The scale invariance of the system places strong constraints on the form of the density functional, unlike nuclear density functionals it can be described in only a very few constants. The derived functional can then be used to predict the properties of small trapped clusters, we find excellent agreement between microscopic calculations of these clusters and results predicted by the density functional. We have also studied the response of the unitary Fermi Gas at very large momentum transfer. Experimentally, the spin and density response are quite different even at very high momentum. We describe approaches to reproduce these responses and analogies to neutrino scattering in nuclei.

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