Portal de Periódicos da CAPES

Pairing of a few Fermi atoms in one dimension

2015; American Physical Society; Volume: 91; Issue: 4 Linguagem: Inglês

10.1103/physreva.91.043610

1538-4446

Pino D’Amico, Massimo Rontani,

Strong Light-Matter Interactions

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 Z\"urn, Wenz, Murmann, Bergschneider, Lompe, and 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.