Viscosity Sum Rules at Large Scattering Lengths

Physics – Condensed Matter – Quantum Gases

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

We use the operator product expansion (OPE) and dispersion relations to obtain new model-independent "Borel-resummed" sum rules for both shear and bulk viscosity of many-body systems of spin-1/2 fermions with predominantly short range S-wave interactions. These sum rules relate Gaussian weights of the frequency-dependent viscosities to the Tan contact parameter C(a). Our results are valid for arbitrary values of the scattering length a, but receive small corrections from operators of dimension larger than 5 in the OPE, and can be used to study transport properties in the vicinity of the infinite scattering length fixed point. In particular, we find that the exact dependence of the shear viscosity sum rule on scattering length is controlled by the function C(a). The sum rules that we obtain depend on a frequency scale w that can be optimized to maximize their overlap with low-energy data.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Viscosity Sum Rules at Large Scattering Lengths does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Viscosity Sum Rules at Large Scattering Lengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Viscosity Sum Rules at Large Scattering Lengths will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-417449

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.