Control of the interaction in a Fermi-Bose mixture

by M. Zaccanti, C. D’Errico, F. Ferlaino, G. Roati, M. Inguscio, G. Modugno

Abstract:

We control the interspecies interaction in a two-species atomic quantum mixture by tuning the magnetic field at a Feshbach resonance. The mixture is composed by fermionic K40 and bosonic Rb87. We observe effects of the large attractive and repulsive interaction energy across the resonance, such as collapse or a reduced spatial overlap of the mixture, and we accurately locate the resonance position and width. Understanding and controlling instabilities in this mixture opens the way to a variety of applications, including formation of heteronuclear molecular quantum gases.

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Reference:

Control of the interaction in a Fermi-Bose mixture,
M. Zaccanti, C. D’Errico, F. Ferlaino, G. Roati, M. Inguscio, G. Modugno,
Phys. Rev. A, volume 74, 2006.

Bibtex Entry:

@article{PhysRevA.74.041605,
  title = {Control of the interaction in a Fermi-Bose mixture},
  author = {Zaccanti, M. and D'Errico, C. and Ferlaino, F. and Roati, G. and Inguscio, M. and Modugno, G.},
  journal = {Phys. Rev. A},
  volume = {74},
  issue = {4},
  pages = {041605},
  numpages = {4},
  year = {2006},
  month = {Oct},
  abstract = {We control the interspecies interaction in a two-species atomic quantum mixture by tuning the magnetic field at a Feshbach resonance. The mixture is composed by fermionic K40 and bosonic Rb87. We observe effects of the large attractive and repulsive interaction energy across the resonance, such as collapse or a reduced spatial overlap of the mixture, and we accurately locate the resonance position and width. Understanding and controlling instabilities in this mixture opens the way to a variety of applications, including formation of heteronuclear molecular quantum gases.},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevA.74.041605},
  url = {http://link.aps.org/doi/10.1103/PhysRevA.74.041605},
  arXiv = {http://arxiv.org/abs/cond-mat/0606757}
}