Three-tangle for mixtures of generalized GHZ and generalized W states

Details Three-tangle for mixtures of generalized GHZ and generalized W states Three-tangle for mixtures of generalized GHZ and generalized W states

2007-11-28

arxiv.org/abs/0711.4477v1

New J. Phys. 10, 043014 (2008)

Physics

Quantum Physics

Scientific paper

10.1088/1367-2630/10/4/043014

We give a complete solution for the three-tangle of mixed three-qubit states composed of a generalized GHZ state, a|000>+b|111>, and a generalized W state, c|001>+d|010>+f|100>. Using the methods introduced by Lohmayer et al. we provide explicit expressions for the mixed-state three-tangle and the corresponding optimal decompositions for this more general case. Moreover, as a special case we obtain a general solution for a family of states consisting of a generalized GHZ state and an orthogonal product state.

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