Computable criterion for partial entanglement in continuous-variable quantum systems
Andreas Gabriel, Marcus Huber, Saša Radić, Beatrix C. Hiesmayr · Physical Review A · 2011
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 optimized.