Abstract
We study the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for systems of nonrelativistic fermions, using the same functional renormalization technique as previously applied to fermionic matter. We find a strong dependence on the cutoff function used in the renormalization flow for a two-body truncation of the action. Adding a simple three-body term substantially reduces this dependence. © 2010 The American Physical Society.
Original language | English |
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Article number | 043628 |
Journal | Physical Review A |
Volume | 81 |
Issue number | 4 |
DOIs | |
Publication status | Published - 26 Apr 2010 |
Keywords
- Condensed Matter - Quantum Gases
- Nuclear Theory
- Physics - Atomic Physics