Error-detected generation and complete analysis of hyperentangled Bell states for photons assisted by quantum-dot spins in double-sided optical microcavities

TL;DR

This paper introduces error-detected schemes using quantum-dot spins in microcavities for the generation and analysis of hyperentangled Bell states, enhancing fidelity and reliability for quantum communication.

Contribution

It presents novel error-detected schemes for deterministic generation and complete analysis of hyperentangled Bell states using quantum-dot microcavities, improving fidelity over previous methods.

Findings

Error detection significantly improves fidelity.

Schemes enable repeat-until-success generation.

Applicable to high-capacity quantum communication.

Abstract

We construct an error-detected block, assisted by the quantum-dot spins in double-sided optical microcavities. With this block, we propose three error-detected schemes for the deterministic generation, the complete analysis, and the complete nondestructive analysis of hyperentangled Bell states in both the polarization and spatial-mode degrees of freedom of two-photon systems. In these schemes, the errors can be detected, which can improve their fidelities largely, far different from other previous schemes assisted by the interaction between the photon and the quantum-dot-cavity system. Our scheme for the deterministic generation of hyperentangled two-photon systems can be performed by repeat until success. These features make our schemes more useful in high-capacity quantum communication with hyperentanglement in the future.