2021/09/28 by Yoshihiro Machida, Ippei Danshita, Daisuke Yamamoto +1 · 10 citations
Chemistry · Physics and Astronomy · #Bose–Einstein condensate #Bose–Hubbard model #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Hubbard model #Lattice (music) #Mott insulator #Mott transition #Nonlinear system #Optical lattice #Phase transition #Physics #Quantum #Quantum fluctuation #Quantum mechanics #Quantum phase transition #Quantum phases #Quantum, superfluid, helium dynamics #Spectroscopy and Laser Applications #Superconductivity #Superfluidity #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.105.l031301
published in Physical Review A 105(3) (American Physical Society) · 9 pages, 5 figures
arxiv created 2021/09/28 · openalex publication_date 2022/03/02 · arxiv updated 2022/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We theoretically study dynamical formation of a quantum droplet in a two-component Bose-Hubbard system with an external trap potential. Specifically, the superfluid in the central region surrounded by the Mott insulator with double filling forms a quantum droplet, which is self-bound thanks to the discontinuous nature of the quantum phase transition between the two phases. We show how to induce the characteristic behavior of the droplet through the control of the trap potential by using the time-dependent Gutzwiller simulations in a two-dimensional system. The static and dynamical properties of the droplet can be described qualitatively by the effective Ginzburg-Landau field theory with cubic-quintic nonlinearities, where the attractive cubic nonlinearlity emerges although all the bare interparticle interactions are repulsive.