Management of the correlations of UltracoldBosons in triple wells

Sunayana Dutta , Marios Tsatsos (1) , Saurabh Basu , Axel Lode (2)

1 Instituto de Physica da Universidade de Sao Paulo - Instituto de Physica da Universidade de Sao Paulo
2 Unibas - Université de Bâle = University of Basel = Basel Universität

Ultracold interacting atoms are an excellent tool to study correlation functions of many-body systems that are generally eluding detection and manipulation. Herein, we investigate the ground state of bosons in a tilted triple-well potential and characterize the many-body state by the eigenvalues of its reduced one-body density matrix and Glauber correlation functions. We unveil how the interplay between the interaction strength and the tilt can be used to control the number of correlated wells as well as the fragmentation, i.e. the number of macroscopic eigenvalues of the reduced one-body density matrix.

Mots clés: Bose-Einstein condensates; fragmentation; cold atoms; optical lattices; MCTDH-X; http://ultracold.org

Domaines: Gaz Quantiques [cond-mat.quant-gas]; Physique Quantique [quant-ph]; Agrégats Moléculaires et Atomiques [physics.atm-clus]; Physique Numérique [physics.comp-ph]

Sunayana Dutta, Marios Tsatsos, Saurabh Basu, Axel Lode. Management of the correlations of UltracoldBosons in triple wells. New Journal of Physics, 2019, 21, pp.053044. ⟨10.1088/1367-2630/ab117d⟩. ⟨hal-02370296⟩