Session S2: Focus Session: Spectroscopy of Strongly Interacting Fermi Gases
2:00 PM–4:00 PM, Friday, May 22, 2009
Gilmer Hall Room: 130
Chair: Walter Hofstetter, University of Frankfurt
Abstract ID: BAPS.2009.DAMOP.S2.2
Abstract: S2.00002 : Universal Relations for the Strongly-interacting Fermi Gas
2:30 PM–2:42 PM
Preview Abstract
MathJax On | Off 
Abstract 
Authors:
Eric Braaten
(Ohio State University)
Lucas Platter
(Ohio State University)
A set of universal relations between various properties of any few-body or many-body system consisting of fermions with two spin states and a large but finite scattering length have been derived by Shina Tan. They involve an extensive quantity called the contact that measures the density of pairs of fermions with different spins and very small separations. We present simple derivations of these universal relations using quantum field theory methods, namely renormalization and the operator product expansion. We identify the contact density as the expectation value of a local operator that annihilates and creates a pair at a point.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.DAMOP.S2.2