1.3k citations · 3.5k across the 14 of their papers we have counts for
4 papers · 1 filter
Covariance matrices and the separability problem
O. Gühne, P. Hyllus, O. Gittsovich +1
We propose a unifying approach to the separability problem using covariance matrices of locally measurable observables. From a practical point of view, our approach leads to strong…
Estimating entanglement measures in experiments
O. Gühne, M. Reimpell, R. F. Werner
We present a method to estimate entanglement measures in experiments. We show how a lower bound on a generic entanglement measure can be derived from the measured expectation value…
Scalable multi-particle entanglement of trapped ions
H. Haeffner, W. Haensel, C. F. Roos +11
Among the various kinds of entangled states, the 'W state' plays an important role as its entanglement is maximally persistent and robust even under particle loss. Such states are…
Generalized spin squeezing inequalities in qubit systems: theory and experiment
J. K. Korbicz, O. Gühne, M. Lewenstein +3
We present detailed derivations, various improvements and application to concrete experimental data of spin squeezing inequalities formulated recently by some of us [Phys. Rev. Let…