Finite-temperature phase transitions in the SU(N) Hubbard model

Article

关键词: BOSE-EINSTEIN CONDENSATION;    METAL-INSULATOR-TRANSITION;    ULTRACOLD QUANTUM GASES;    MEAN-FIELD THEORY;    INFINITE DIMENSIONS;    OPTICAL LATTICE;    MOLECULES;    FERMIONS;    SYSTEMS;    ATOMS;   

DOI  :  10.1103/PhysRevB.94.041110

来源: SCIE

【 摘 要 】

We investigate the SU(N) Hubbard model for the multicomponent fermionic optical lattice system, combining dynamical mean-field theory with the continuous-time quantum Monte Carlo method. We obtain the finite-temperature phase diagrams with N <= 6 and find that low-temperature properties depend on the parity of the components. The magnetically ordered state competes with the correlated metallic state in the system with an even number of components (N >= 4), yielding the first-order phase transition. It is also clarified that in the odd-component system, the ordered state is realized at relatively lower temperatures and the critical temperature is constant in the strong coupling limit.

【 授权许可】

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