In-Medium Similarity Renormalization Group for Finite Nuclei
- Heiko Hergert, The Ohio State University
Tuesday, November 6, 11:00 AM - Theory Seminar
NSCL Seminar Room
The primary use of the Similarity Renormalization Group (SRG) in nuclear physics is the derivation of effective interactions from underlying realistic vacuum NN and 3N interactions, which have a greatly improved convergence behavior in nuclear many-body calculations. The SRG flow equation formalism has much wider applications, though.
In the In-Medium SRG the Hamiltonian is evolved directly in the A-body system. By a suitable choice of generator the ground state is decoupled from particle-hole excitations, and the IMSRG can be considered an ab initio technique for solving the many-body problem. The modest computational effort makes calculations for medium-mass and heavy nuclei feasible.
I will give an overview of the method, present results for closed-shell nuclei with chiral NN and 3N interactions, and discuss recent successes in extending our IM-SRG calculations to open-shell nuclei.