Vector optomechanical entanglement

TL;DR

This paper demonstrates how polarization control in a cavity system enables coherent, reversible switching of optomechanical entanglement between different optical modes, advancing quantum network capabilities.

Contribution

It introduces a method to control and switch optomechanical entanglement via polarization tuning, a novel approach for quantum information processing.

Findings

Entanglement can be switched between TE and TM modes by polarization tuning.

The switching is coherent and reversible, enabling dynamic control.

Potential applications in quantum networks and information transfer.

Abstract

The polarizations of optical fields, besides field intensities, provide more degrees of freedom to manipulate coherent light-matter interactions. Here we propose how to achieve a coherent switch of optomechanical entanglement in a polarized-light-driven cavity system. We show that by tuning the polarizations of the driving field, the effective optomechanical coupling can be well controlled and, as a result, quantum entanglement between the mechanical oscillator and the optical transverse electric (TE) mode can be coherently and reversibly switched to that between the same phonon mode and the optical transverse magnetic (TM) mode. This ability of switching optomechanical entanglement with such a vectorial device can be important for building a quantum network being capable of efficient quantum information interchanges between processing nodes and flying photons.