• DOI:10.1103/PhysRevA.96.022701
• Corpus ID: 119344657

Universality in fermionic dimer-dimer scattering

@article{Deltuva2017UniversalityIF,
  title={Universality in fermionic dimer-dimer scattering},
  author={A. Deltuva},
  journal={Physical Review A},
  year={2017},
  volume={96}
}

• 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 corrections arising due to the finite range of the two-fermion interaction. These results are of considerably higher accuracy as compared to previous works, but confirm most of the previous results except for the lattice effective field theory calculations.