Coherent control of quantum states by quadratically chirped short laser pulses

TL;DR

This paper introduces a new method for coherently controlling quantum states using quadratically chirped laser pulses, enabling robust creation of superpositions in systems with lambda energy level configurations.

Contribution

The paper proposes a novel scheme employing quadratically chirped laser pulses for coherent control of quantum states, demonstrated through dressed state analysis and simulations.

Findings

Reliable creation of arbitrary superpositions achieved

Robustness against parameter variations demonstrated

Single broadband pulse suffices for control

Abstract

We present a novel scheme for coherent manipulation of populations and robust creation of arbitrary coherent superposition of metastable states of a quantum system with lambda configuration of operating energy levels using laser pulses with a quadratically chirped carrier frequency. The case of a single broadband laser pulse is considered, when the frequency spectrum of the pulse exceeds the frequency distance between the metastable energy levels of the system. The results of the dressed state analysis and numerical simulation are presented, demonstrating reliable and robust creation of an arbitrary coherent superposition of metastable states by changing the parameters of laser pulses.