Antiferromagnetic order of strongly interacting fermions in a trap: real-space dynamical mean-field analysis

作者：Snoek M^*; Titvinidze I; Toeke C; Byczuk K; Hofstetter W

来源：New Journal of Physics, 2008, 10: 093008.

DOI：10.1088/1367-2630/10/9/093008

We apply dynamical mean-field theory to strongly interacting fermions in an inhomogeneous environment. With the help of this real-space dynamical mean-field theory (R-DMFT) we investigate antiferromagnetic states of repulsively interacting fermions with spin-1/2 in a harmonic potential. Within R-DMFT, antiferromagnetic order is found to be stable in spatial regions with total particle density close to one, but persists also in parts of the system where the local density significantly deviates from half filling. In systems with spin imbalance, we find that antiferromagnetism is gradually suppressed and phase separation emerges beyond a critical value of the spin imbalance.

• 出版日期2008-9-10