Pairing of few Fermi atoms in one dimension

Pino D'Amico; Massimo Rontani

doi:10.1103/physreva.91.043610

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arXiv · 1404.7762

Pairing of few Fermi atoms in one dimension

Pino D'Amico·Massimo Rontani

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Abstract

We study a few Fermi atoms interacting through attractive contact forces in a one-dimensional trap by means of numerical exact diagonalization. From the combined analysis of energies and wave functions of correlated ground and excited states we find evidence of BCS-like pairing even for very few atoms. For moderate interaction strength, we reproduce the even-odd oscillation of the separation energy observed in [G. Zuern, A. N. Wenz, S. Murmann, A. Bergschneider, T. Lompe, and S. Jochim, Phys. Rev. Lett. 111, 175302 (2013)]. For strong interatomic attraction the arrangement of dimers in the trap differs from the homogeneous case as a consequence of Pauli blockade in real space.

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Pino D'Amico, Massimo Rontani. 2015-03-17. Pairing of few Fermi atoms in one dimension. https://doi.org/10.1103/physreva.91.043610

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