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The K-way negativities as entanglement measures | | S. Shelly Sharma
; N. K. Sharma
; | | Date: |
8 Aug 2006 | | Abstract: | A classification of N-partite states, based on K-way negativities, is proposed. The principle underlying the definition of K-way negativity for pure and mixed states of N subsystems is NPT sufficient condition. However, K-way partial transpose with respect to a subsystem is defined so as to shift the focus to K-way coherences instead of K subsystems of the composite system. For an N-partite composite system, K-way negativity measures the K-way coherence. For a three qubit system a combined analysis of 2-way, 3-way and global negativities provides distinct measures of genuine tripartite, W-state like and bipartite entanglement of the composite system. | | Source: | arXiv, quant-ph/0608062 | | Services: | Forum | Review | PDF | Favorites | |
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