Optomechanical devices, entanglement and teleportation

TL;DR

This thesis explores optomechanical systems for quantum teleportation, entanglement generation, and optimization of quantum fidelity using Gaussian operations and multi-mode driving.

Contribution

It introduces methods to optimize teleportation fidelity, predicts robust mechanical-optical entanglement, and demonstrates improved entanglement via multi-mode driving.

Findings

Optimized quantum teleportation fidelity with Gaussian local operations.

Predicted stable entanglement between mechanical modes and optical sidebands.

Enhanced optomechanical entanglement through dual optical mode driving.

Abstract

In this thesis we study continuous variable systems, focusing on optomechanical devices where a laser field interacts with a macroscopic mechanical oscillator through radiation pressure. We consider the optimization problem of quantum teleportation by means of Gaussian local operations and we study the relation between the amount of entanglement shared by Alice and Bob and the maximum fidelity they can reach for the teleportation of coherent states. We also theoretically predict the possibility of creating a robust entanglement between a mechanical mode of a Fabry-Perot mirror and the Stokes sideband of the output field. We show that by driving two different optical modes supported by the cavity, a stable steady state is reachable in which the optomechanical entanglement is significantly improved.