Coherent control of regions with spatial excitation of populations and coherence between
two lower states in three-level Λ-type quantum systems mediated by the self-induced …

We present a model describing the use of ultra-short strong pulses to control the population
of the excited level of a two-level quantum system. In particular, we study an off-resonance …

We consider a duplicated two-level system where each two-level subsystem is driven by a
strong resonant femtosecond pulse and a weak resonant femtosecond pulse connects cross …

Here, I discuss the propagation of an ultrashort pulse through a collection of harmonic
multilevel systems. In the limit of weak excitation and a large number of excited states, I …

An ultrashort weak pulse that propagates resonantly on the∣ a⟩→∣ b⟩ transition of a three-
level system (∣ a⟩,∣ b⟩,∣ c⟩) experiences reshaping effects on a time scale longer than …

An ultrashort strong nonresonant pulse induces transient phenomena in an optically thick
medium consisting of an ensemble of nondegenerate two-level atoms (nonadiabatic …

The most typical way to optically control population of atomic and molecular systems is to
illuminate them with radiation, resonant to the relevant transitions. Here we consider a …

Multiphoton transitions can be reached by many routes through a continuum of virtual levels.
We show that the transition probability of two-photon and multiphoton processes can be …

We consider the properties of the coherent interaction between resonance radiation and a
three-level medium. We find stationary solutions corresponding to the propagation of an …

We study the dynamics of a two-level system driven by an off-resonance few-cycle pulse
which has a phase jump ϕ at t= t 0, in contrast to many-cycle pulses, under the nonrotating …