We describe the entanglement of a Jaynes-Cummings system, where a two-level atom is also strongly driven by an external coherent field while it crosses a resonant cavity prepared in a coherent state. First we consider the atom-cavity field entanglement, described by the Von Neumann entropy. We find that it depends only on the interaction time and the initial atomic state. The entropy vanishes in the case of maximally polarized atom, independent of the interaction time, whereas it reaches its maximum value for atom in the upper or lower state and for long enough interaction times. Then we investigate the entanglement between two consecutive strongly driven atoms interacting with the cavity mode assumed in the vacuum state, showing that they never entangle in spite of the existence of atom-atom correlations.
|Titolo:||Maximum entanglement in a Jaynes-Cummings system with strongly driven atoms|
|Autori interni:||CASAGRANDE, FEDERICO|
|Parole Chiave:||entanglement ; cavity quantum electrodynamics|
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Data di pubblicazione:||2006|
|Digital Object Identifier (DOI):||10.1142/S021797920603384X|
|Appare nelle tipologie:||01 - Articolo su periodico|