Pairing of few Fermi atoms in one dimension
arXiv:1404.7762 · doi:10.1103/PhysRevA.91.043610
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.
Major revision to appear in Physical Review A
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- Energy, contact, and density profiles of one-dimensional fermions in a harmonic trap via non-uniform lattice Monte Carlo
- A modular implementation of an effective interaction approach for harmonically trapped fermions in 1D
- Unconventional pairing in few-fermion systems at finite temperature
- Few-body perspective on fermionic pairing in one spatial dimension
- Few-to-many-particle crossover of pair excitations in a superfluid
- Composite Bosons Superposition Ansatz Approach to One-Dimensional Trapped Few-Fermion Systems
- Unconventional pairing in few-fermion systems tuned by external confinement