Adiabatic cavity QED with pairs of atoms: Atomic entanglement and Quantum teleportation

TL;DR

This paper explores the adiabatic dynamics of two atoms interacting with a cavity mode, focusing on entanglement and quantum teleportation, while analyzing effects of decoherence, detuning, and asymmetries.

Contribution

It introduces a detailed model of atomic entanglement and teleportation in cavity QED considering time-dependent couplings and non-ideal effects.

Findings

Energy crossings influence system dynamics

Entanglement can be generated via adiabatic evolution

Teleportation protocol is feasible under certain conditions

Abstract

We study the dynamics of a pair of atoms, resonantly interacting with a single mode cavity, in the situation where the atoms enter the cavity with a time delay between them. Using time dependent coupling functions to represent the spatial profile of the mode, we considered the adiabatic limit of the system. Although the time evolution is mostly adiabatic, energy crossings play an important role in the system dynamics. Following from this, entanglement, and a procedure for cavity state teleportation are considered. We examine the behaviour of the system when we introduce decoherence, a finite detuning, and potential asymmetries in the coupling profiles of the atoms.