Effective-interaction approach to the many-boson problem
Artikel i vetenskaplig tidskrift, 2009

We show that the convergence behavior of the many-body numerical diagonalization scheme for strongly interacting bosons in a trap can be significantly improved by the Lee-Suzuki method adapted from nuclear physics: One can construct an effective interaction that acts in a space much smaller than the original Hilbert space. In particular for short-ranged forces and strong correlations, the method offers a good estimate of the energy and the excitation spectrum, at a computational cost several orders of magnitude smaller than that required by the standard method.

convergence of numerical methods

boson systems

Författare

J Christensson

Christian Forssen

Chalmers, Teknisk fysik, Subatomär fysik

S Åberg

S Reimann

Physical Review A - Atomic, Molecular, and Optical Physics

1050-2947 (ISSN) 1094-1622 (eISSN)

Vol. 79 012707-

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1103/PhysRevA.79.012707