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Metastability and directional emission characteristics of excitons in 1D optical lattices

Metastability and directional emission characteristics of excitons in 1D optical lattices

We calculate radiative lifetimes of collective electronic excitations of atoms in an infinite one dimensional lattice. The translational symmetry along the lattice restricts the photon wave vector component parallel to the lattice to the exciton wave number and thus the possible emission directions. The resulting radiation damping rate and emission …