Collisions between Tunable Halo Dimers: Exploring an Elementary Four-Body Process with Identical Bosons

by F. Ferlaino, S. Knoop, M. Mark, M. Berninger, H. Schöbel, H.-C. Nägerl, R. Grimm

Abstract:

We study inelastic collisions in a pure, trapped sample of Feshbach molecules made of bosonic cesium atoms in the quantum halo regime. We measure the relaxation rate coefficient for decay to lower-lying molecular states and study the dependence on scattering length and temperature. We identify a pronounced loss minimum with varying scattering length along with a further suppression of loss with decreasing temperature. Our observations provide insight into the physics of a few-body quantum system that consists of four identical bosons at large values of the two-body scattering length.

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Reference:

Collisions between Tunable Halo Dimers: Exploring an Elementary Four-Body Process with Identical Bosons,
F. Ferlaino, S. Knoop, M. Mark, M. Berninger, H. Schöbel, H.-C. Nägerl, R. Grimm,
Phys. Rev. Lett., volume 101, 2008.

Bibtex Entry:

@article{PhysRevLett.101.023201,
  title = {Collisions between Tunable Halo Dimers: Exploring an Elementary Four-Body Process with Identical Bosons},
  author = {Ferlaino, F. and Knoop, S. and Mark, M. and Berninger, M. and Sch"obel, H. and N"agerl, H.-C. and Grimm, R.},
  journal = {Phys. Rev. Lett.},
  volume = {101},
  issue = {2},
  pages = {023201},
  numpages = {4},
  year = {2008},
  month = {Jul},
  abstract = {We study inelastic collisions in a pure, trapped sample of Feshbach molecules made of bosonic cesium atoms in the quantum halo regime. We measure the relaxation rate coefficient for decay to lower-lying molecular states and study the dependence on scattering length and temperature. We identify a pronounced loss minimum with varying scattering length along with a further suppression of loss with decreasing temperature. Our observations provide insight into the physics of a few-body quantum system that consists of four identical bosons at large values of the two-body scattering length.},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevLett.101.023201},
  url = {http://link.aps.org/doi/10.1103/PhysRevLett.101.023201},
  arXiv = {http://arxiv.org/abs/0803.4078}
}