Continuous variable entanglement with orbital angular momentum multiplexing in coherently prepared media

TL;DR

This paper proposes a theoretical method for generating continuous variable vortex optical entanglement in coherently prepared media using Raman scattering, with potential applications in advanced quantum information processing.

Contribution

It introduces a novel CV framework for vortex light entanglement via atomic coherence, differing from traditional DV approaches and employing Raman scattering instead of SPDC.

Findings

Numerical simulations identify optimal parameters for maximal entanglement.

The framework provides a reference for vortex light entanglement in quantum information.

Potential applications include quantum teleportation and high-dimensional quantum communication.

Abstract

Quantum entanglement constitutes a pivotal resource, serving as a fundamental cornerstone within the field of quantum information science. In recent years, the study of vortex light entanglement has garnered widespread attention due to its unique structure and inherent advantages; however, the majority of these investigations are primarily focused on discrete variable (DV) systems. In this paper, we present a theoretical framework for generating vortex optical entanglement in coherently prepared media, employing continuous variable (CV) analysis and leveraging Raman scattering as an alternative to the conventional spontaneous parametric down-conversion (SPDC) method. The entanglement arises from the quantum correlation between the two light fields, induced by atomic coherence. Using numerical simulations, we thoroughly explore the impact of various tunable system parameters on the degree of entanglement, ultimately identifying the optimal conditions for maximal entanglement. Our findings offer a reference framework for vortex light entanglement, with potential implications across quantum teleportation, quantum key distribution, quantum computing, high-dimensional quantum information, and other related fields.