Name
Abstract | ||
|---|---|---|
We define a set of 2 n驴1驴1 entanglement monotones for n qubits and give a single measure of entanglement in terms of these. This measure is zero except on globally entangled (fully inseparable) states. This measure is compared to the Meyer---Wallach measure for two, three, and four qubits. We determine the four-qubit state, symmetric under exchange of qubit labels, which maximizes this measure. It is also shown how the elementary monotones may be computed as a function of observable quantities. We compute the magnitude of our measure for the ground state of the four-qubit superconducting experimental system investigated in [M. Grajcar et al., Phys. Rev. Lett. 96, 047006 (2006)], and thus confirm the presence of global entanglement in the ground state. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1007/s11128-007-0052-7 | Quantum Information Processing |
Keywords | Field | DocType |
Meyer–Wallach measure,elementary monotones,entanglement monotones,global entanglement,four-qubit state,qubit labels,03.65.Ud,03.67.Lx | Multipartite entanglement,Superconductivity,Ground state,Observable,Quantum electrodynamics,W state,Quantum entanglement,Quantum mechanics,Squashed entanglement,Qubit,Physics | Journal |
Volume | Issue | ISSN |
6 | 3 | 1570-0755 |
Citations | PageRank | References |
2 | 0.76 | 2 |
Authors | ||
8 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Peter J. Love | 1 | 6 | 2.55 |
| Alec Maassen Brink | 2 | 2 | 1.10 |
| A. Yu. Smirnov | 3 | 2 | 1.10 |
| M. H. Amin | 4 | 8 | 1.83 |
| M. Grajcar | 5 | 2 | 1.44 |
| E. Il'Ichev | 6 | 2 | 1.44 |
| A. Izmalkov | 7 | 2 | 0.76 |
| A. M. Zagoskin | 8 | 2 | 1.44 |