A Computable Criterion for Partial Entanglement in Continuous Variable Quantum Systems

A general and computable criterion for k-(in)separability in continuous multipartite quantum systems is presented. The criterion can be experimentally implemented with a finite and comparatively low number of local observables. We discuss in detail how the detection quality can be optimised

Lorentz invariance of entanglement classes in multipartite systems

We analyze multipartite entanglement in systems of spin-1/2 particles from a relativistic perspective. General conditions which have to be met for any classification of multipartite entanglement to be Lorentz invariant are derived, which contributes to a physical understanding of entanglement classification. We show that quantum information in a relativistic setting requires the partition of the Hilbert space into particles to be taken seriously. Furthermore, we study exemplary cases and show how the spin and momentum entanglement transforms relativistically in a multipartite setting

Erasing the Past and Impacting the Future with Kaons at a Phi-factory

The well known quantum eraser concepts are applied to entangled kaons. Due to different measurement procedures, a specific feature of neutral kaons not shared by other quantum systems, we show that novel options for the quantum eraser phenomena open. Moreover, the proposed kaonic erasers may in future be experimentally demonstrated with the upgraded KLOE detector at the φ –factory