Residual entanglement and sudden death: A direct connection

José Geraldo Jr. Gonçalves de Oliveira (1) , José Geraldo Peixoto de Faria (2) , M.C. Nemes (3)

1 CFP - Centro de Formação de Professores
2 DADB - Departamento Acadêmico de Disciplinas Básicas
3 ICEx - Departamento de Física

We explore the results of [V. Coffman, et al., Phys. Rev. A 61 (2000) 052306] derived for general tripartite states in a dynamical context. We study a class of physically motivated tripartite systems. We show that whenever entanglement sudden death occurs in one of the partitions residual entanglement will appear. For fourpartite systems however, the appearance of residual entanglement is not conditioned by sudden death of entanglement. We can only say that if sudden death of entanglement occurs in some partition there will certainly be residual entanglement.

Mots clés: tripartite entanglement; sudden death; residual entanglement

Domaines: Physique Quantique [quant-ph]

José Geraldo Jr. Gonçalves de Oliveira, José Geraldo Peixoto de Faria, M.C. Nemes. Residual entanglement and sudden death: A direct connection. Physics Letters A, 2011, pp.PLA20958. ⟨10.1016/j.physleta.2011.10.020⟩. ⟨hal-00637091⟩