Eur. Phys. J. D (2014) 68: 311
https://doi.org/10.1140/epjd/e2014-50290-4

Regular Article

Quantum interference effects in a Λ-type atom interacting with two short laser pulse trains

Institute of Space Sciences, Bucharest-Măgurele, P.O. Box MG-23, 77125, Romania

^a e-mail: buica@spacescience.ro

Received: 8 April 2014
Received in final form: 20 May 2014
Published online: 21 October 2014

Abstract

We study the quantum interference between the excitation pathways in a three-level Λ-type atom interacting with two short laser pulse trains under the conditions of electromagnetically induced transparency. The probability amplitude equations which describe the interaction of a three-level Λ-type atom with two laser pulse trains are numerically solved. We derive analytical expressions for the population of the upper excited state for resonant laser pulse trains with a rectangular temporal profile. By varying the parameters of the laser pulse trains such as area of a single pulse, detuning, repetition period, and number of individual pulses, we analyze the quantum interference between the excitation pathways in terms of the upper excited state population.