Simulating a Mott Insulator Using Attractive Interaction
Simulating a Mott Insulator Using Attractive Interaction
We study the particle-hole symmetry in the Hubbard model using ultracold fermionic atoms in an optical lattice. We demonstrate the mapping between charge and spin degrees of freedom and, in particular, show the occurrence of a state with "incompressible" magnetization for attractive interactions. Our results present a novel approach to …