Trichromatic π-Pulse for Ultrafast Total Inversion of a Four-Level Ladder System

Applied Sciences

Carles Serrat²  Montserrat Corbera¹  John Afa² 

[1] Escola Politècnica Superior, Universitat de Vic, Carrer de la Laura 13, Vic (Barcelona) 08500, Spain; E-Mail:;Departament de Física, Universitat Politècnica de Catalunya, Colom 11, Terrassa (Barcelona) 08222, Spain; E-Mail:

关键词: ultrashort pulses;    coherent control;    quantum computing;   

DOI  :  10.3390/app5041484

来源: mdpi

【 摘 要 】

We present a numerical solution for complete population inversion in a four-level ladder system obtained by using a full π-pulse illumination scheme with resonant ultrashort phase-locked Gaussian laser pulses. We find that a set of pulse areas such ascompletely inverts the four-level system considering identical effective dipole coupling coefficients. The solution is consistent provided the involved electric fields are not too strong and it is amply accurate also in the case of diverse transition dipole moments. We study the effect of detuning and chirp of the laser pulses on the complete population inversion using the level structure of atomic sodium interacting with ps and fs pulses as an example. Our result opens the door for multiple applications such as efficient ultrashort pulse lasing in the UV or the engineering of quantum states for quantum computing.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.