2019/01/30 by Arijit Dutta, Abhishek Joshi, K. Sengupta +1
Physics and Astronomy · #Boson #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Ground state #Lambda #Lattice (music) #Mott insulator #Optical lattice #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum phase transition #Quantum, superfluid, helium dynamics #Spin–orbit interaction #Superfluidity #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.99.195126
published as Phys. Rev. B 99, 195126 (2019) · 11 pages, 12 figures
arxiv created 2019/01/30 · openalex publication_date 2019/05/14 · arxiv updated 2019/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the thermal physics of a Bose-Hubbard model with Rashba spin-orbit coupling starting from a strong coupling mean-field ground state. The essential role of the spin-orbit coupling (\ensuremathγ) is to promote condensation of the bosons at a finite wave vector \mathbitk0. We find that the bosons display either homogeneous or phase-twisted or orbital ordered superfluid phases, depending on \ensuremathγ and the interspecies interaction strength (\ensuremathλ). We show that an increase of \ensuremathγ leads to suppression of the critical interaction Uc for the superfluid to Mott insulator transition in the ground state and a reduction of the Tc for superfluid to Bose-liquid transition at a fixed interaction strength. We capture the thermal broadening in the momentum distribution function, and the real space profiles of the thermally disordered magnetic textures, including their homogenization for T\ensuremath\gtrsimTc. We provide a Landau theory based description of the ground state phase boundaries and thermal transition scales and discuss experiments which can test our theory.