In this work we report, for the first time, on the realization of 1D strongly-correlated liquids of ultracold fermions interacting repulsively within SU(N) symmetry, with a tunable number N of spin components. We observe that static and dynamic properties of the system strongly deviate from those of ideal fermions and, for N > 2, from those of a two-component Luttinger liquid. In particular, we have observed that, in the large-N limit, the system exhibits properties of a bosonic spinless liquid, as predicted by Nobel prize winner C. N. Yang and never observed before.
A one-dimensional liquid of fermions with tunable spin / Guido Pagano; Marco Mancini; Giacomo Cappellini; Pietro Lombardi; Florian Schäfer; Hui Hu; Xia-Ji Liu; Jacopo Catani; Carlo Sias; Massimo Inguscio; Leonardo Fallani. - In: NATURE PHYSICS. - ISSN 1745-2473. - STAMPA. - 10:(2014), pp. 198-201. [10.1038/nphys2878]
A one-dimensional liquid of fermions with tunable spin
MANCINI, MARCO;CAPPELLINI, GIACOMO;LOMBARDI, PIETRO ERNESTO;CATANI, JACOPO;INGUSCIO, MASSIMO;FALLANI, LEONARDO
2014
Abstract
In this work we report, for the first time, on the realization of 1D strongly-correlated liquids of ultracold fermions interacting repulsively within SU(N) symmetry, with a tunable number N of spin components. We observe that static and dynamic properties of the system strongly deviate from those of ideal fermions and, for N > 2, from those of a two-component Luttinger liquid. In particular, we have observed that, in the large-N limit, the system exhibits properties of a bosonic spinless liquid, as predicted by Nobel prize winner C. N. Yang and never observed before.
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