Monogamy Inequality in terms of Negativity for Three-Qubit States
| dc.creator | Ou, Yong-Cheng | |
| dc.creator | Fan, Heng | |
| dc.date | 2007-02-13 | |
| dc.date | 2007-04-04 | |
| dc.date.accessioned | 2026-07-07T08:04:46Z | |
| dc.date.available | 2026-07-07T08:04:46Z | |
| dc.description | We propose a new entanglement measure to quantify three qubits entanglement in terms of negativity. A monogamy inequality analogous to Coffman-Kundu-Wootters (CKW) inequality is established. This consequently leads to a definition of residual entanglement, which is referred to as three-$π$ in order to distinguish from three-tangle. The three-$π$ is proved to be a natural entanglement measure. By contrast to the three-tangle, it is shown that the three-$π$ always gives greater than zero values for $W$ and GHZ classes, implying there always exists three-way entanglement for them, and three-tangle generally underestimates three-way entanglement of a given system. This investigation will offer an alternative tool to understand genuine multipartite entanglement. | |
| dc.description | 5 pages, 3 figures, minor modifications are made | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0702127 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0702127 | |
| dc.identifier | Physical Review A 75, 062308 (2007) | |
| dc.identifier | doi:10.1103/PhysRevA.75.062308 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/130085 | |
| dc.subject | Quantum Physics | |
| dc.title | Monogamy Inequality in terms of Negativity for Three-Qubit States | |
| dc.type | text |