Quantum simulation of ultracold atoms in optical lattice based on dynamical mean-field theory
نویسندگان
چکیده
With the development of atomic cooling and optical lattice technology, quantum system composed ultracold gas has grown up to be a powerful tool in simulation. The pure highly controllable nature gives it strong regulatory ability. Nowadays, people can simulate more complex interesting physical phenomena, which deepens people's understanding many-body physics. In recent years, we have studied different Bose systems with correlations based on bosonic dynamical mean-field theory, including multi-component, high orbit, long-range interaction systems. Through calculation theory been generalized multi-component real space versions, reveal wealth phenomena from weak intervals intervals. phase diagram spin-1 bosons cubic at zero temperature finite is calculated. existence spin-singlet condensate found, observed that superfluid heated into Mott insulator even (odd) filling through first (second) transition. presence magnetic field, ground state degeneracy broken, there are very rich phases system, such as nematic phase, ferromagnetic insulating polar superfluid, broken-axisymmetry superfluid. addition, multistep condensations also observed. Further, calculate zero-temperature mixed alkali metal atoms spin-0 earth find exhibits non-zero ordering, shows second-order insulation-superfluid transition when number <i>n</i>=1, first-order <i>n</i>=2. two-step Mott-insulating-superfluid due mass imbalance was study interactions, use Rydberg discover two distinctive types supersolids, then realize superradiant coupled orbits by controlling reflection pump laser high-finesse cavity. Finally, high-orbit propose new mechanism spin angular-momentum coupling spinor correlation spontaneous symmetry breaking two-dimensional orbital frustration hexagonal lattice. We between leads exotic spin-orbital intertwined orders.
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ژورنال
عنوان ژورنال: Chinese Physics
سال: 2023
ISSN: ['1000-3290']
DOI: https://doi.org/10.7498/aps.72.20230701