Theory of Antibound States in Partially Filled Narrow Band Systems

G. Seibold, F. Becca, and J. Lorenzana
Phys. Rev. Lett. 100, 016405 – Published 11 January 2008

Abstract

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 are reliable 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.

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  • Received 11 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.016405

©2008 American Physical Society

Authors & Affiliations

G. Seibold1, F. Becca2, and J. Lorenzana3

  • 1Institut für Physik, BTU Cottbus, P.O. Box 101344, 03013 Cottbus, Germany
  • 2INFM-Democritos, National Simulation Center and International School for Advanced Studies (SISSA), I-34014 Trieste, Italy
  • 3SMC-INFM, ISC-CNR, Dipartimento di Fisica, Università di Roma “La Sapienza,” P. Aldo Moro 2, I-00185 Roma, Italy

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Vol. 100, Iss. 1 — 11 January 2008

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