Multipartite entanglement measure for all discrete systems

Details Multipartite entanglement measure for all discrete systems Multipartite entanglement measure for all discrete systems

2007-12-03

arxiv.org/abs/0712.0346v2

Phys. Rev. A 78, 012342 (2008).

Physics

Quantum Physics

Extended version including explicitly the 3 qubit case, 7 pages, 3 figures

Scientific paper

10.1103/PhysRevA.78.012342

Via a multidimensional complementarity relation we derive a novel operational entanglement measure for any discrete quantum system, i.e. for any multidimensional and multipartite system. This new measure admits a separation into different classes of entanglement obtained by using a flip operator 2,3,...,n times, defining a m-flip concurrence. For mixed states bounds on this m-flip concurrence can be obtained. Moreover, the information content of a n partite multidimensional system admits an intuitive interpretation. Explicitly, the three qubits system is analyzed and the physical difference in entanglement of the W-state, the GHZ state or the bi-separable state is revealed.

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