Eur. Phys. J. D 47, 127-131 (2008)
https://doi.org/10.1140/epjd/e2008-00019-1

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 vidiella@ifi.unicamp.br

Received: 17 October 2007
Revised: 23 December 2007
Published online: 8 February 2008

Abstract

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.