Entanglement reciprocation using three level atoms in a lambda configuration
Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas, 13083 Campinas São Paulo, Brazil
Corresponding author: a firstname.lastname@example.org
Revised: 23 December 2007
Published online: 8 February 2008
We propose a scheme in which entanglement can be transferred from atoms (discrete variables) to entangled states of cavity fields (continuous variables). The cavities play the role of a kind of quantum memory for entanglement, in such a way that it is possible to retrieve it back to the atoms. In our method, two three level atoms in a lambda configuration, previously entangled, are set to interact with single mode cavity fields prepared in coherent states. During the process, one e-bit of entanglement may be deposited in the cavities in an efficient way. We also show that the stored entanglement may be transferred back to flying atoms.
PACS: 42.50.-p – Quantum optics / 42.50.Dv – Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements / 03.67.Mn – Entanglement production, characterization, and manipulation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008