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Article scientifique
Accès libre
Anglais

Competition of spin and charge excitations in the one-dimensional Hubbard model

Date de publication2013
Résumé

Motivated by recent experiments with ultracold fermionic atoms in optical lattices, we study finite temperature magnetic correlations, as singlet and triplet correlations, and the double occupancy in the one-dimensional Hubbard model. We point out that for intermediate interaction strengths the double occupancy has an intriguing doubly nonmonotonic temperature dependence due to the competition between spin and charge modes, related to the Pomeranchuk effect. Furthermore, we determine properties of magnetic correlations in the temperature regimes relevant for current cold atom experiments and discuss effects of the trap on spatially integrated observables. We estimate the entropy and the temperature reached in the experiment by Greif, Uehlinger, Jotzu, Tarruell, and Esslinger [Science 340, 1307 (2013)].

Groupe de recherche
Financement
  • Swiss National Science Foundation - Division II
Citation (format ISO)
SCIOLLA, Bruno et al. Competition of spin and charge excitations in the one-dimensional Hubbard model. In: Physical review, A, Atomic, molecular, and optical physics, 2013, vol. 88, n° 6, p. 063629. doi: 10.1103/PhysRevA.88.063629
Fichiers principaux (1)
Article (Published version)
accessLevelPublic
Identifiants
ISSN du journal1050-2947
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Informations techniques

Création07/04/2014 14:23:00
Première validation07/04/2014 14:23:00
Heure de mise à jour14/03/2023 21:05:41
Changement de statut14/03/2023 21:05:41
Dernière indexation16/01/2024 09:36:37
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