The K-way negativities as entanglement measures
| dc.creator | Sharma, S. Shelly | |
| dc.creator | Sharma, N. K. | |
| dc.date | 2006-08-08 | |
| dc.date | 2007-01-12 | |
| dc.date.accessioned | 2026-07-07T07:40:43Z | |
| dc.date.available | 2026-07-07T07:40:43Z | |
| dc.description | A classification of N-partite states, based on K-way negativities (K=2 to N), is proposed. The 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 system, the fraction of K-way negativity contributing to global negativity, is obtained. After minimizing K-way negativities through local unitary qubit rotations, a combined analysis of 2-way, 3-way and global negativities is shown to provide distinct measures of genuine tripartite, W-state like and bipartite entanglement, for three qubit composite system. To illustrate the point, entanglement of three qubit GHZ class states, W-class states, three boson state and noisy states is analysed. While genuine N-partite entanglement of a composite system is generated by N-way coherences, N-partite entanglement in general can be present due to (K<N)-way coherences as well. | |
| dc.description | revtex, 13 pages, 6 figures, Section VII replaced by Sections VII and VIII, Figures revised and typos corrected | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0608062 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0608062 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/121860 | |
| dc.subject | Quantum Physics | |
| dc.title | The K-way negativities as entanglement measures | |
| dc.type | text |