Nonclassical lattice solitons in optical lattice via Electromagnetically induced transparency

TL;DR

This paper proposes a theoretical scheme to generate nonclassical lattice solitons in an optical atomic system using electromagnetically induced transparency, enabling low-power, slow-propagating solitons with tunable phase properties.

Contribution

It introduces a novel theoretical approach to produce nonclassical lattice solitons leveraging EIT and enhanced Kerr effects in a four-level atomic system.

Findings

Low power density and photon flux achievable

Solitons can propagate with very slow group velocity

Both in-phase and out-of-phase solitons can be generated

Abstract

An optical four-level atomic discrete system through optical induction is proposed. A theoretical scheme to produce nonclassical lattice solitons (NLS) in the system is presented with the use of the effects of enhanced self-phase modulation and the giant kerr effect in the electromagnetically induced transparency. The power density and the photon flux can be tuned to a very low level by the controlling field and the soliton can propagate with very slow group velocity. By changing the sign of the detuning $\Delta_{1}$, both in-phase and $\pi$ out-of-phase NLSs can be produced in this system.