Dark States of Multilevel Fermionic Atoms in Doubly Filled Optical Lattices

We propose to use fermionic atoms with degenerate ground and excited internal levels (F_g\rightarrow F_e, loaded into the motional ground state of an optical lattice with two atoms per lattice site, to realize dark states with no radiative decay. The physical mechanism behind the dark states is an interplay of Pauli blocking and multilevel dipolar interactions. The dark states are independent of lattice geometry, can support an extensive...