The genuine concurrence is a standard quantifier of multipartite entanglement, detection,
and quantification of which still remains a difficult problem from both the theoretical and …

So-called direct measurements of entanglement are collective measurements on multiple
copies of a (bipartite or multipartite) quantum system that directly provide one with a value …

Along with the vast progress in experimental quantum technologies there is an increasing
demand for the quantification of entanglement between three or more quantum systems …

Experimental determination of entanglement is important not only to characterize the state
and use it in quantum information, but also in understanding complicated phenomena such …

Genuine multipartite entanglement represents the strongest type of entanglement, which is
an essential resource for quantum information processing. Standard methods to detect …

We present entanglement witness operators for detecting genuine multipartite
entanglement. These witnesses are robust against noise and require only two local …

So-called direct measurements of entanglement are collective measurements on multiple
copies of a (bipartite or multipartite) quantum system that directly provide one a value for …

Simply and reliably detecting and quantifying entanglement outside laboratory conditions
will be essential for future quantum information technologies. Here we address this issue by …

Entanglement in a quantum system can be demonstrated experimentally by performing the
measurements prescribed by an appropriate entanglement witness. However, the …

It is shown that, despite strong nonlinearity, entanglement of formation of a two-qubit state
can be measured without prior state reconstruction. Collective measurements on a small …