论文标题
二维SU（3）费米晶格气体中的热碱过渡与种群失衡
Thermal Ising transition in two-dimensional SU(3) Fermi lattice gases with population imbalance
论文作者
论文摘要
我们专注于装入正方形光学晶格中的三组分SU（3）费米气体，一种组成部分与其他成分之间的种群失衡。 SU（3）Heisenberg模型具有强大的耦合，该模型与外部磁场相结合，该模型将其与人口失衡相结合。我们在平均场水平上讨论基态，然后使用半古典蒙特卡洛方法分析热波动。尽管没有挫败感，但相互作用，人口失衡和热波动的相互作用引起了与突然的Ising对称性破坏相关的相变。这代表了具有连续对称性的低维系统中离散对称破坏的新方案。讨论了冷碱 - 地球（类似）原子的可能实现。
We focus on three-component SU(3) Fermi gases loaded into a square optical lattice, with population imbalance between one component and the others. At strong coupling the system is described by the SU(3) Heisenberg model with an external field that couples to the population imbalance. We discuss the ground state at the mean-field level and then analyze the thermal fluctuations with the semi-classical Monte Carlo method. The interplay of interactions, population imbalance and thermal fluctuations gives rise to a phase transition linked to the breaking of an emergent Ising symmetry, despite the absence of frustration. This represents a new scenario of discrete symmetry breaking in low-dimensional systems with continuous symmetries. Possible implementations with cold alkaline-earth(-like) atoms are discussed.
