| Full text | |
| Author(s): |
de Oliveira, Thiago R.
[1]
Total Authors: 1
|
| Affiliation: | [1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Physical Review A; v. 80, n. 2, p. 022331, 2009. |
| Web of Science Citations: | 5 |
| Abstract | |
Exploring an analytical expression for the convex roof of the pure state squared concurrence for rank 2 mixed states the entanglement of a system of three particles under decoherence is studied, using the monogamy inequality for mixed states and the residual entanglement obtained from it. The monogamy inequality is investigated both for the concurrence and the negativity in the case of local independent phase damping channel acting on generalized Greenberger-Horne-Zeilinger states of three particles and the local independent amplitude damping channel acting on generalized |W >=|001 >+|010 >+|100 > state of three particles. It is shown that the bipartite entanglement between one qubit and the rest has a qualitative similar behavior to the entanglement between individual qubits, and that the residual entanglement in terms of the negativity cannot be a good entanglement measure for mixed states, since it can increase under local decoherence. (AU) | |
| FAPESP's process: | 08/03557-8 - Entanglement in many-particle systems |
| Grantee: | Thiago Rodrigues de Oliveira |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |