Multipartite

Quantum mechanics

Superposition principle

Telecommunications

Computer science

W state

Squashed entanglement

Multipartite entanglement

Physics

Quantum entanglement

Multiplexing

Mathematics

Angular momentum

Quantum

Combinatorics

Topology (electrical circuits)

Physical Review Letters

We demonstrate the experimental generation of orbital angular momentum (OAM) multiplexed multipartite entanglement with cascaded four-wave mixing processes in a continuous variable (CV) system. In particular, we implement the simultaneous generation of 9 sets of OAM multiplexed tripartite entanglement over 27 Laguerre-Gauss (LG) modes, as well as 20 sets of OAM multiplexed bipartite entanglement over 40 LG modes, which show the rich entanglement structure of the system. In addition, we also generate tripartite entanglement of three types of coherent OAM superposition modes. Such OAM multiplexed multipartite entanglement opens the avenue to construct CV parallel quantum network for realizing parallel quantum information protocols.

Deterministic Generation of Orbital-Angular-Momentum Multiplexed Tripartite Entanglement