8-12 July 2019
Cité des Congrès
Europe/Paris timezone

Characterization of Mott insulators through momentum-space atom correlations

10 Jul 2019, 14:56
13m
Salle I (Cité des Congrès)

Salle I

Cité des Congrès

Speaker

David Clément (Institut d'Optique)

Description

We report on the investigation of the three-dimensional single-atom-resolved distributions of bosonic Mott insulators in momentum-space. Firstly, we measure the two-body correlations deep in the Mott regime, finding a perfectly contrasted bunching whose periodicity reproduces the reciprocal lattice. In addition, we show that the two-body correlation length is inversely proportional to the in-trap size of the Mott state. Our findings show that the quantum statistics of ideal bosons uniformly distributed in the lattice sites quantitatively captures momentum-space correlations of a Mott insulator at vanishing tunnelling. Secondly, we extract the spectral weight of the Mott quasi-particles from the momentum distributions. On approaching the transition towards a superfluid, the momentum spread of the spectral weight decreases as a result of the increased mobility of the quasi-particles.

Choix de session parallèle 4.3 Simulateurs quantiques

Primary author

David Clément (Institut d'Optique)

Presentation Materials