Multi-channel entanglement distribution using spatial multiplexing from four-wave mixing in atomic vapor

Abstract

Four-wave mixing in atomic vapor allows for the generation of multi-spatial-mode states of light containing many pairs of two-mode entangled vacuum beams. This in principle can be used to send independent secure keys to multiple parties simultaneously using a single light source. In our experiment, we demonstrate this spatial multiplexing of information by selecting three independent pairs of entangled modes and performing continuous-variable measurements to verify the correlations between entangled partners. In this way, we generate three independent pairs of correlated random bit streams that could be used as secure keys. We then demonstrate a classical four-party secret sharing scheme as an example for how this spatially multiplexed source could be used.

Accepted in Journal of Modern Optics, 7 pages, 3 figures, 2 tables

References in corpus (3)

• Experimental Quantum Secret Sharing and Third-Man Quantum Cryptography
• Generation of spatially broadband twin beams for quantum imaging
• Quantum Noise Locking

Cited by in corpus (5)

• Generative Machine Learning for Robust Free-Space Communication
• Gaussian Beam-Propagation Theory for Nonlinear Optics - Featuring an Exact Treatment of Orbital Angular Momentum Transfer
• Optimal mode configuration for multiple phase-matched four-wave mixing processes
• All-optical mode conversion via spatially-multimode four-wave mixing
• Coupled Three-Mode Squeezed Vacuum