Mott Transition for Strongly-Interacting 1D Bosons in a Shallow Periodic PotentialReport as inadecuate




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1 Laboratoire Charles Fabry - Optique atomique LCF - Laboratoire Charles Fabry 2 European Laboratory for Non-linear Spectroscopy LENS 3 University of Auckland Auckland 4 INRIM - Istituto Nazionale di Ricerca Metrologica 5 UNIGE - Université de Genève

Abstract : We investigate the superfluid-insulator transition of one-dimensional interacting Bosons in both deep and shallow periodic potentials. We compare a theoretical analysis based on Monte-Carlo simulations in continuum space and Luttinger liquid approach with experiments on ultracold atoms with tunable interactions and optical lattice depth. Experiments and theory are in excellent agreement. It provides a quantitative determination of the critical parameter for the Mott transition and defines the regime of validity of widely used approximate models, namely the Bose-Hubbard and sine-Gordon models.





Author: Guilhem Boéris - Lorenzo Gori - Marteen D. Hoogerland - Avinash Kumar - Eleonora Lucioni - Luca Tanzi - Massimo Inguscio - Thier

Source: https://hal.archives-ouvertes.fr/



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