Entanglement sudden death via two-photon processes in cavity QED

W B Cardoso, A T Avelar, B Baseia, N G de Almeida
2009 Journal of Physics B: Atomic, Molecular and Optical Physics  
In the present work we study the entanglement dynamics between two atoms when one of them, considered as having either two or three levels, is left to interact with a single mode of a high-Q cavity through two-photon processes. Making use of the negativity, we show the necessary conditions for these systems to exhibit the sudden death phenomena.
doi:10.1088/0953-4075/42/19/195507 fatcat:hbu4peor2vbztjslwqkvp3kk7m