Dynamical control of tripartite entangled states
In this paper we exploit the relationship between classical instability and entanglement to control the creation of entangled states in a open system of three quantum coupled parametric oscillators at high temperature. Introducing a suitable external perturbation in the classical counterpart we are able to experimentally control the transition from stable to unstable behaviour. Entanglement arises in the same parameter regions where the classical system is unstable. A comparison between the different entanglement features in the systems with two and three quantum coupled oscillators is also presented. The observed differences are compatible with the phenomenon of entanglement monogamy. Our experimental method may open a new perspective for manipulating quantum features at high temperature regimes.