Universal dimerized quantum droplets in a one-dimensional lattice

Understand

The ground-state properties of two-component bosonic mixtures in a one-dimensional optical lattice are studied both from few- and many-body perspectives.

• We rely directly on a microscopic Hamiltonian with attractive inter-component and repulsive intra-component interactions to demonstrate the formation of a quantum liquid.
• We reveal that its formation and stability can be interpreted in terms of finite-range interactions between dimers.
• We derive an effective model of composite bosons (dimers) which correctly captures both the few- and many-body properties and validate it against exact results obtained by DMRG method for the full Hamiltonian.