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Effective-interaction approach to the many-boson problem

J Christensson ; Christian Forssén (Institutionen för fundamental fysik, Subatomär fysik) ; S Åberg ; S Reimann
Physical Review A (1050-2947). Vol. 79 (2009), 1, p. 012707.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: boson systems, convergence of numerical methods


Article Number: 012707



Denna post skapades 2009-03-14. Senast ändrad 2014-09-02.
CPL Pubid: 91540

 

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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)

Ämnesområden

Atomfysik
Beräkningsfysik

Chalmers infrastruktur