Enhancement of two-photon transitions with tailored quantum light

TL;DR

This paper investigates how tailored quantum light, especially entangled photons, can more efficiently induce two-photon transitions than classical pulses, demonstrating enhanced coherent control through quantum correlations.

Contribution

It introduces the first example of enhanced two-photon transition control using entangled photons and explores conditions for such enhancement in interacting systems.

Findings

Entangled photons outperform classical pulses in driving two-photon transitions.

Quantum correlations enable enhanced coherent control.

Interaction effects are necessary for enhancement in collective systems.

Abstract

We examine a fundamental problem in quantum optics: What is the optimal pulse form to drive a two-photon-transition? We show that entangled photons in general do so more efficiently than optimal classical pulses, and provide the first example of enhanced coherent control through quantum correlations. In ensembles of collectively driven two-level systems, such enhancement requires non-vanishing interactions.