Preparation of Genuinely Entangled Six-Atom State via Cavity Quantum Electrodynamics

Abstract

A cavity quantum electrodynamics scheme for preparing a genuinely entangled state [A. Borras, et al., J. Phys. A 40 (2007) 13407] on six two-level atoms is proposed. In the scheme, the atom-cavity detuning is much bigger than the atom-cavity coupling strength and the necessary preparation time is much shorter than the Rydberg-atom lifespan. Hence the scheme has two distinct features, i.e., insensitive to the cavity decay and the atom radiation.

Scheme for Implementing Controlled Dense Coding with Six-Atom Cluster State in Cavity QED

“…Fortunately, the infidelity is not sensitive to the temporal fluctuation of the neighboring atoms and thus can be neglected as pointed out by Refs. [26,[45][46][47][48][49]. More importantly, it is possible to experimentally solve the difficulty about operating more atoms in cavity QED by using the same method.…”

Generation of a Genuine Six-Atom Entangled State in Cavity QED

“…An approach to implement this six-qubit state was proposed in cavity QED system. [22] On the other hand, a new state was discovered with a simpler algebraic structure than Borras et al's one, [23] which is given by,…”