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Pairing in Few-Fermion Systems with Attractive Interactions

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons31216

Zürn,  G.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31169

Wenz,  A. N.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons59278

Murmann,  Simon
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons59280

Bergschneider,  Andrea
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30777

Lompe,  T.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30636

Jochim,  S.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Citation

Zürn, G., Wenz, A. N., Murmann, S., Bergschneider, A., Lompe, T., & Jochim, S. (2013). Pairing in Few-Fermion Systems with Attractive Interactions. Physical Review Letters, 111(17): 175302. doi:10.1103/PhysRevLett.111.175302.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-B0AC-6
Abstract
We study quasi-one-dimensional few-particle systems consisting of one to six ultracold fermionic atoms in two different spin states with attractive interactions. We probe the system by deforming the trapping potential and by observing the tunneling of particles out of the trap. For even particle numbers, we observe a tunneling behavior that deviates from uncorrelated single-particle tunneling indicating the existence of pair correlations in the system. From the tunneling time scales, we infer the differences in interaction energies of systems with different number of particles, which show a strong odd-even effect, similar to the one observed for neutron separation experiments in nuclei.