Related Experiment Video
Updated: Aug 6, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Experimental measurement of quadrature squeezing in quadripartite entanglement
Abstract:
Multipartite entanglement is one of the most fundamental and important resources for quantum information processing in both discrete variable and continuous variable (CV) regimes. For its applications in the CV regime, such as the realization of quantum teleportation networks and quantum dense coding, the quadrature squeezing of multipartite entanglement plays a significant role. Here, we report the first, to the best of our knowledge, experimental measurement of the quadrature squeezing in the quadripartite entanglement generated by the two-beam pumped cascaded four-wave mixing process in a 85 R b vapor cell. Moreover, we find that the quadrature squeezing is nonexistent in each pair of beams, but exists in the whole quadripartite entanglement. Our results may find potential applications in building a multi-user quantum secret sharing network.
Related Concept Videos
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
Mass Analyzers: Common Types
Estimation of the Physical Quantities
The Uncertainty Principle
Extraction: Partition and Distribution Coefficients
For extracting a solute from an aqueous phase into an...
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

