An Observable Measure of Multiqubit Entanglement for Pure States
G K. Brennen
Recently, Meyer and Wallach [D.A. Meyer and N.R. Wallach (2002), J. of Math. Phys., 43, pp. 4273] proposed a measure of multi-qubit entanglement that is a function on pure states. We find that this function can be interpreted as a physical quantity related to the average purity of the constituent qubits and show how it can be observed in a quantum non-demolition measurement. A possible realization is described for measuring the entanglement of a chain of atomic qubits trapped in a 3D optical lattice.
International Conference on Quantum Information
An Observable Measure of Multiqubit Entanglement for Pure States, International Conference on Quantum Information
(Accessed December 8, 2023)