Nanodot-Cavity Electrodynamics and Photon Entanglement

TL;DR

This paper develops a theory for a solid-state quantum controlled-phase gate using nanodot-cavity structures, enabling photon entanglement through giant optical nonlinearity and optimized quantum efficiency.

Contribution

It introduces an integrable model for a quantum gate based on nanodot-microcavity-fiber systems, advancing solid-state quantum information processing.

Findings

Conditional phase shift of approximately π/10 achieved

Design strategies improve quantum efficiency

Theoretical framework supports photon entanglement

Abstract

Quantum electrodynamics of excitons in a cavity is shown to be relevant to quantum operations. We present a theory of an integrable solid-state quantum controlled-phase gate for generating entanglement of two photons using a coupled nanodot-microcavity-fiber structure. A conditional phase shift of $O(\pi/10)$ is calculated to be the consequence of the giant optical nonlinearity keyed by the excitons in the cavities. Structural design and active control, such as electromagnetic induced transparency and pulse shaping, optimize the quantum efficiency of the gate operation.