Effective-interaction approach to the many-boson problem

Autor:	Christensson, J., Forssén, C., Åberg, S., Reimann, S. M.
Rok vydání:	2008
Předmět:	Condensed Matter - Other Condensed Matter Nuclear Theory Physics - Computational Physics
Zdroj:	Phys. Rev. A 79, 012707 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.79.012707
Popis:	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. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0802.2811 Zobrazit plný text záznamu View this record from Arxiv