Theory of antibound states in partially filled narrow band systems

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We present a theory of the dynamical two-particle response function in the Hubbard model based on the time-dependent Gutzwiller approximation. The results are in excellent agreement with exact diagonalization on small clusters and give reliable results even for high densities, where the usual ladder approximation breaks down. We apply the theory to the computation of antibound states relevant for Auger spectroscopy and cold atom physics. A special bonus of the theory is its computational simplicity.
4 pages, 3 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/162850

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0706.1424
 http://arxiv.org/abs/0706.1424
 Phys. Rev. Lett. 100, 016405 (2008)
 doi:10.1103/PhysRevLett.100.016405

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arXiv