1D to 3D beyond-mean-field dimensional crossover in mixture quantum droplets

L Lavoine (1) , T Bourdel (1)

1 Laboratoire Charles Fabry / Gaz Quantiques

The existence of quantum droplets in binary Bose-Einstein condensate mixtures rely on beyondmean field effects, competing with mean-field effects. Interestingly, the beyond-mean field effect is changing from repulsive in 3D to attractive in 1D leading to drastically different behaviors. We study in detail the crossover between these two regimes in a quasi-1D regime where the radial wavefunction is frozen. Quantum droplets exist for all values and sign of the mean-field interaction. We find that approaching the crossover is experimentally appealing as it reduces the relative importance of three-body losses and give realistic numbers for the realization of quantum droplet in the crossover, which would permit to test beyond-mean-field theories to an unprecedented precision.

Domaines: Physique Quantique [quant-ph]; Gaz Quantiques [cond-mat.quant-gas]

L Lavoine, T Bourdel. 1D to 3D beyond-mean-field dimensional crossover in mixture quantum droplets. 2020. ⟨hal-03021471v1⟩