Impossibility to describe repulsion with contact interaction

  • Morawetz K
  • Männel M
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Abstract

Contact interactions always lead to attractive behavior. Arguments are presented to show why a repulsive interacting system, e.g. Bose gases, cannot be described by contact interactions and corresponding treatments are possibly obscured by the appearance of bound states. The usually used cut-offs are identified as finite range parameters. © 2009 Elsevier B.V. All rights reserved.

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Authors

  • K. Morawetz

  • M. Männel

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