Correlation steering in the angularly multimode Raman atomic memory

TL;DR

This paper demonstrates a method to control the direction of correlated photons in a multimode atomic memory using acousto-optic deflectors, enabling independent steering of Stokes and anti-Stokes photons for quantum information applications.

Contribution

It introduces a technique to steer correlation directions in a multimode Raman atomic memory using AODs, allowing independent control of photon propagation directions.

Findings

Correlation steering achieved with AODs

Independent control of Stokes and anti-Stokes directions

Potential for improved quantum information processing

Abstract

We present the possibility of steering the direction of correlations between the off-resonant Raman scattered photons from the angularly multimode atomic memory based on warm rubidium vapors. Using acousto-optic deflectors (AOD) driven by different modulation frequencies we experimentally change the angle of incidence of the laser beams on the atomic ensemble. Performing correlations measurements for various deflection angles we verify that we can choose the anti-Stokes light propagation direction independently of the correlated Stokes scattered light in the continuous way. As a result we can select the spatial mode of photons retrieved from the memory, which may be important for future development of quantum information processing.