Generalising multipartite concentratable entanglement for practical applications: mixed, qudit, and optical states

Understand

The controlled SWAP test for detecting and quantifying entanglement applied to pure qubit states is robust to small errors in the states and efficient for large multi-qubit states (Foulds et al.

• 2021 Quantum Sci.
• Technol.
• 6, 035002 (doi:10.1088/2058-9565/abe458)).