Atomic Coherence Assisted Multipartite Entanglement Generation with DELC Four-Wave Mixing

TL;DR

This paper proposes a novel all-optical method using DELC four-wave mixing to generate and modulate multipartite entanglement within a single device, enhancing quantum information capacity.

Contribution

Introduction of a DELC four-wave mixing scheme that enables simultaneous generation and modulation of multipartite entanglement through atomic coherence control.

Findings

Entanglement can be directly modulated via atomic coherence.

Multiple quantum channels are constructed, extending entanglement modes.

The system integrates generation and modulation of entangled states.

Abstract

Multipartite entanglement plays an important role in quantum information processing and quantum metrology. Here, the dressing-energy-level-cascaded (DELC) four-wave mixing (FWM) processes are proposed to generate all-optical controlled multipartite entanglement within a single device. The entanglement characteristics of the produced states of light are characterized by applying the Duan criterion and the positivity under partial transposition criterion. Moreover, by using an internal dressing field to modulate atomic coherence, multiple quantum coherent channels of FWM are simultaneously constructed, which result in a great extension of entanglement mode number and quantum information capacity. We find that the violation of the entanglement criteria inequalities is coherent-channel dependent, and the produced states can be directly modulated via atomic coherence. Our system can integrate the generation and modulation of the entangled states in one process. It may help provide a compact method for realizing large scale quantum networks.