Universality in fermionic dimer-dimer scattering

  title={Universality in fermionic dimer-dimer scattering},
  author={A. Deltuva},
  journal={Physical Review A},
  • A. Deltuva
  • Published 31 May 2017
  • Physics
  • Physical Review A
Collisions of two fermionic dimers near the unitary limit are studied using exact four-particle equations for transition operators in momentum space. Universal properties of dimer-dimer phase shifts and effective range expansion (ERE) parameters are determined. The inclusion of the fourth-order momentum term in the ERE significantly extends its validity to higher collision energies. The dimer-dimer scattering length and effective range are determined in the unitary limit as well as their… 

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