Related Experiment Video
Updated: Apr 23, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Witnessing genuine multipartite entanglement with positive maps
Marcus Huber1, Ritabrata Sengupta2
1ICFO-Institut de Ciencies Fotoniques, 08860 Castelldefels, Barcelona, Spain and Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
Abstract:
We derive a general framework that lifts any set of bipartite to multipartite entanglement witnesses and we show how positive maps can naturally be incorporated into this framework. We show that some previous approaches for multipartite entanglement detection are intimately connected to the witnesses derived from partial transposition and that such criteria can easily be outperformed in higher dimensions by nondecomposable maps. As an exemplary case we present a witness that is capable of detecting genuine multipartite entanglement in bound entangled states.
Related Concept Videos
Theorem of Pappus
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
¹H NMR: Pople Notation
A proton...
Moment-Area Theorems
The theorem is divided into two parts. The first part connects the angle between tangents at any two points on the beam's elastic curve to the area under a curve derived by...
¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Theorems of Pappus and Guldinus
For finding the surface area, consider a differential line element that generates a ring with surface area dA when revolved.

