We investigate the decay of entanglement of generalized N-particle Greenberger-Horne-Zeilinger (GHZ) states interacting with independent reservoirs. Scaling laws for the decay of entanglement and for its finite-time extinction (sudden death) are derived for different types of reservoirs. The latter is found to increase with N. However, entanglement becomes arbitrarily small, and therefore usele...

Abstract As robots increasingly become part of our everyday lives, questions arise with regards to how approach them and understand in social contexts. The Western history human–robot relations revolves around competition control, which restricts ability relate machines other ways. In this study, we take a relational explore different manners socializing robots, especially those that exceed an ...

We show that on exceeding a certain degree of mixedness (as quantified by the von Neumann entropy), entangled states become useless for teleporatation. By increasing the dimension of the entangled systems, this entropy threshold can be made arbitrarily close to maximal. This entropy is found to exceed the entropy threshold sufficient to ensure the failure of dense coding.