arXiv subjects

Sajeev John

Publications and source records attributed to Sajeev John.

20 records · Page 2Linked to original sources

arXiv1997

Quantum self-induced transparency in frequency gap media

We study quantum effects of light propagation through an extended absorbing system of two-level atoms placed within a frequency gap medium (FGM). Apart from ordinary solitons and single particle impurity band states, the many-particle spectrum of the system contains massive pairs of confined gap excitations and their bound complexes - gap solitons. In addition, ``composite'' solitons are predicted as bound states of ordinary and gap solitons. Quantum gap and composite solitons propagate without dissipation, and should be associated with self-induced transparency pulses in a FGM.

quant-ph↗

arXiv1997

Multiphoton localization and propagating quantum gap solitons in a frequency gap medium

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.

quant-ph↗