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Dr. Ariel Sommer

MIT (Boston, USA)

Monday, July 30th, 2012 at 03:00:00 PM  

Conference room Querzoli - LENS - via Nello Carrara 1 - Sesto Fiorentino (Florence)

Published on-line at 09:58:41 AM on Thursday, July 26th, 2012

Spin Transport and Dimensional Crossover in Strongly Interacting Fermi Gases

Using dilute gases of ultracold, fermionic atoms to study many-body systems.

Dilute gases of ultracold, fermionic atoms provide a versatile platform for studies of many-body physics. I will discuss measurements of the spin transport properties of a strongly interacting Fermi gas and of the pair binding energy in a one-dimension optical lattice. Spin transport is studied by spatially separating the spin components of the gas and measuring the spin drag and spin diffusion coefficients as functions of temperature and interaction strength.

At low temperatures and resonant interactions the spin diffusivity is set by Planck's constant and the atomic mass. A one-dimensional optical lattice allows the gas to be tuned from three-dimensional to two- dimensional with increasing lattice depth. Radio-frequency spectroscopy is used to measure the binding energy of pairs of atoms versus lattice depth, interaction strength, and density.

For further informations, please contact Dr. Giacomo Roati.