Control of populations of two-level systems by a single resonant laser pulse
Abstract
We present a simple approach allowing to obtain analytical expressions for laser pulses that can drive a two-level system in an arbitrarily chosen way. The proposed scheme relates every desired population-evolution path to a single resonant laser pulse. It allows to drive the system from any initial superposition of the two states to a final state having the desired distribution of the populations. We exemplify the scheme with a concrete example, where the system is driven from a non-stationary superposition of states to one of its eigenstates. We argue that the proposed approach may have interesting applications for designing pulses that can control ultrafast charge-migration processes in molecules. Although focused on laser driven population control, the results obtained are general and could be applied for designing other types of control fields.
Keywords
Cite
@article{arxiv.1407.4997,
title = {Control of populations of two-level systems by a single resonant laser pulse},
author = {Nikolay V. Golubev and Alexander I. Kuleff},
journal= {arXiv preprint arXiv:1407.4997},
year = {2015}
}