On single-frequency asymptotics for the Maxwell-Bloch equations: pure states

TL;DR

This paper constructs and analyzes single-frequency asymptotic solutions for the Maxwell-Bloch equations describing laser action under quasiperiodic pumping, using advanced averaging techniques.

Contribution

It introduces a method to obtain and analyze single-frequency solutions for the Maxwell-Bloch equations with quasiperiodic pumping, extending averaging theory to this context.

Findings

Constructed solutions with single-frequency asymptotics.

Analyzed stability of harmonic states.

Extended averaging theory to dynamical systems on manifolds.

Abstract

We consider damped driven Maxwell-Bloch equations for a single-mode Maxwell field coupled to a two-level molecule. The equations are used for semiclassical description of the laser action. Our main result is the construction of solutions with single-frequency asymptotics of the Maxwell field in the case of quasiperiodic pumping. The asymptotics hold for solutions with harmonic initial values which are stationary states of averaged reduced equations in the interaction picture. We calculate all harmonic states and analyse their stability. Our calculations rely on the Hopf reduction by the gauge symmetry group U(1). The asymptotics follow by an extension of the averaging theory of Bogolyubov--Eckhaus--Sanchez-Palencia onto dynamical systems on manifolds.The key role in the application of the averaging theory is played by a special a priori estimate.