Entangled three-qubit states without concurrence and three-tangle
| dc.creator | Lohmayer, Robert | |
| dc.creator | Osterloh, Andreas | |
| dc.creator | Siewert, Jens | |
| dc.creator | Uhlmann, Armin | |
| dc.date | 2006-06-08 | |
| dc.date | 2006-09-12 | |
| dc.date.accessioned | 2026-07-07T07:38:38Z | |
| dc.date.available | 2026-07-07T07:38:38Z | |
| dc.description | We provide a complete analysis of mixed three-qubit states composed of a GHZ state and a W state orthogonal to the former. We present optimal decompositions and convex roofs for the three-tangle. Further, we provide an analytical method to decide whether or not an arbitrary rank-2 state of three qubits has vanishing three-tangle. These results highlight intriguing differences compared to the properties of two-qubit mixed states, and may serve as a quantitative reference for future studies of entanglement in multipartite mixed states. By studying the Coffman-Kundu-Wootters inequality we find that, while the amounts of inequivalent entanglement types strictly add up for pure states, this ``monogamy'' can be lifted for mixed states by virtue of vanishing tangle measures. | |
| dc.description | 10 RevTeX pages, 3 figures, abstract and conclusions substantially extended | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0606071 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0606071 | |
| dc.identifier | Phys. Rev. Lett. 97, 260502 (2006) | |
| dc.identifier | doi:10.1103/PhysRevLett.97.260502 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/121160 | |
| dc.subject | Quantum Physics | |
| dc.title | Entangled three-qubit states without concurrence and three-tangle | |
| dc.type | text |