arXiv:quant-ph/9706058 · Physical Review Letters
Multiphoton Localization and Propagating Quantum Gap Solitons in a Frequency Gap Medium
Sajeev John, Valery I. Rupasov
Abstract
The many-particle spectrum of an isotropic frequency gap medium doped with impurity resonance atoms is studied using the Bethe ansatz technique. The spectrum is shown to contain pairs of quantum correlated ``gap excitations'' and their heavy bound complexes (``gap solitons''), enabling the propagation of quantum information within the classically forbidden gap. In addition, multiparticle localization of the radiation and the medium polarization occurs when such a gap soliton is pinned to the impurity atom.