Pairing in few-fermion systems with attractive interactions

• Verfasst von: Zürn, Gerhard [VerfasserIn]
• Verfasst von: Wenz, André Niklas [VerfasserIn]
• Verfasst von: Murmann, Simon [VerfasserIn]
• Verfasst von: Bergschneider, Andrea [VerfasserIn]
• Verfasst von: Jochim, Selim [VerfasserIn]
• Titel: Pairing in few-fermion systems with attractive interactions
• Verf.angabe: G. Zürn, A.N. Wenz, S. Murmann, A. Bergschneider, T. Lompe, and S. Jochim
• E-Jahr: 2013
• Jahr: 22 October 2013
• Umfang: 5 S.
• Teil: volume:111
• Teil: year:2013
• Teil: number:17
• Teil: elocationid:175302
• Teil: pages:1-5
• Teil: extent:5
• Fussnoten: Gesehen am 02.08.2021
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2013
• Band/Heft Quelle: 111(2013), 17, Artikel-ID 175302, Seite 1-5
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.111.175302
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1765235359

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.