Nonperturbative Renormalisation Group: Applications to the few and many-body systems

Details Nonperturbative Renormalisation Group: Applications to the few and many-body systems Nonperturbative Renormalisation Group: Applications to the few and many-body systems

2009-12-18

arxiv.org/abs/0912.3665v1

Physics

Nuclear Physics

Nuclear Theory

Talk on International IUPAP Conference on Few-Body Problems in Physics, September, 2009, Bonn, Germany

Scientific paper

We consider the applications of functional renormalisation group to few and many-body systems. As an application to the few-body dynamics we study the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for systems of few nonrelativistic fermions. We find a strong dependence on the cutoff function used in the renormalisation flow for a two-body truncation of the action. Adding a simple three-body term substantially reduces this dependence. In the context of many-body physics we study the dynamics of both symmetric and asymmetric many-fermion systems using the same functional renormalisation technique. It is demonstrated that functional renormalisation group gives sensible and reliable results and provides a solid theoretical ground for the future studies. Open questions as well as lines of further developments are discussed.

Affiliated with

Also associated with

No associations

Rating

Nonperturbative Renormalisation Group: Applications to the few and many-body systems 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 Nonperturbative Renormalisation Group: Applications to the few and many-body systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonperturbative Renormalisation Group: Applications to the few and many-body systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-349712