Quantum control and signal enhancement exploiting the Stokes-anti-Stokes coherence

TL;DR

This paper introduces a theoretical framework for controlling and enhancing signals via Stokes-anti-Stokes coherence, enabling quantum information manipulation and signal amplification through interference phenomena.

Contribution

It reveals how classical driving links Stokes and anti-Stokes processes coherently, enabling phase-controlled interference for quantum control and signal enhancement beyond existing limits.

Findings

Destructive interference enables quantum information control.

Constructive interference leads to exponential signal amplification.

The framework unifies understanding of quantum control and metrology mechanisms.

Abstract

We present a theoretical framework for the coherent coupling between Stokes and anti-Stokes scattering processes, revealing interference phenomena inaccessible to either process alone. Within a dispersive-interaction model beyond the resolved-sideband limit, we show that classical driving and system linewidth coherently links the two channels, enabling phase-controlled interference. Destructive interference induces intrinsic asymmetry in dispersively coupled systems, enabling coherent control of quantum information storage and transfer, while constructive interference leads to exponential signal amplification and thus enhanced quantum detection. This work establishes a unified picture for understanding Stokes-anti-Stokes coherence as a fundamental mechanism underlying both quantum control and metrology. Furthermore, it suggests that these functionalities can be further enhanced by implementing Stokes-anti-Stokes arrays.