[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, Nov. 15, 2010
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L104

Making Contact: Sum Rules and the Momentum Distribution of Fermi Gases
at Large Scattering Lengths

Joaquin Drut
LANL

A few years ago, Shina Tan and others derived a set of exact relations 
valid for strongly
interacting non-relativistic Fermi gases in the regime of short 
interaction range and large
scattering length. Recent developments have shown that a central 
quantity in these identities,
the so-called "contact" C, actually plays a crucial role in the 
characterization of these
systems, as it determines multiple thermodynamic properties as well as 
linear-response sum
rules. However, computing the "contact" presents a challenge as it 
requires non-perturbative
methods such as Quantum Monte Carlo. After a brief review on the general 
properties of these
systems, I will present our first results for C as a function of 
temperature in the limit of
infinite scattering length. If time permits, I will comment on our 
investigations into
adapting Lattice QCD algorithms for these calculations.

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