Entanglement reciprocation using three level atoms in a lambda configuration

TL;DR

This paper presents a scheme for transferring entanglement between three-level atoms and cavity fields, enabling quantum memory and retrieval of entanglement in a lambda configuration system.

Contribution

It introduces a novel method for entanglement transfer and storage using three-level atoms and cavity fields, demonstrating efficient entanglement deposition and retrieval.

Findings

Entanglement can be transferred from atoms to cavity fields.

Cavity fields can serve as quantum memory for entanglement.

Stored entanglement can be retrieved back to atoms.

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.