26ème Congrès Général de la SFP

Momentum-space correlations of lattice Bose gases close to the Mott transition

Non programmé

20m

Centre des Congrès de la Villette (Cité des sciences et de l'Industrie, Paris)

Poster MC8 Dernières avancées dans le domaine des technologies quantiques Session Poster 2: MC1, MC4, MC8, MC10, MC12, MC14, MC20, MC21, MC23, MC24, MC25, REDP

Orateur

Maxime Allemand

Description

We study interacting Helium-4 Bose gases in an optical lattice, realising the 3D Bose-Hubbard hamiltonian [1]. This hamiltonian holds a quantum phase transition, from a superlfuid to a Mott insulator, and we report our on-going efforts to characterise many-body correlations in the vicinity of this transition. To this aim, we use a unique experimental probe which consists in detecting metastable Helium-4 atoms one by one after a long time-of-flight to measure atom correlations in momentum space [2]. We have recently exploited this approach to reveal the Bogoliubov pairs of atoms with opposite momenta in the quantum depletion of a weakly interacting Bose gas [3] and to study the high-order correlations (between up to 6 atoms) in lattice superfluids and Mott insulators [4]. Our present efforts rely on these previous studies to quantify momentum correlations close to the Mott transition.

[1] C. Carcy et al. Phys. Rev. Lett. (2020)
[2] H. Cayla et al. Phys. Rev. A (2018)
[3] A. Tenart et al. Nat. Phys. (2021)
[4] G. Hercé et al. Phys. Rev. Research (2023)