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Witnessing Multipartite Entanglement without Entanglement Witness Operators
Luca Pezze, Yan Li, Weidong Li +1
Quantum mechanics predicts the existence of correlations between composite systems -- multipartite entanglement (ME) -- that, while puzzling our physical intuition, enable technolo…
Satisfying the Einstein-Podolsky-Rosen criterion with massive particles
J. Peise, I. Kruse, K. Lange +8
In 1935, Einstein, Podolsky and Rosen (EPR) questioned the completeness of quantum mechanics by devising a quantum state of two massive particles with maximally correlated space an…
Interaction-free measurements by quantum Zeno stabilisation of ultracold atoms
J. Peise, B. Lücke, L. Pezzè +6
Quantum mechanics predicts that our physical reality is influenced by events that can potentially happen but factually do not occur. Interaction-free measurements (IFMs) exploit th…
Fast and optimal generation of entanglement in bosonic Josephson junctions
Giacomo Sorelli, Manuel Gessner, Augusto Smerzi +1
We use an exact quantum phase model to study the dynamical generation of particle-entanglement in a bosonic Josephson junction composed by two coupled and interacting Bose-Einstein…
Quantum-enhanced multiparameter estimation in multiarm interferometers
Mario A. Ciampini, Nicolò Spagnolo, Chiara Vitelli +3
Quantum metrology is the state-of-the-art measurement technology. It uses quantum resources to enhance the sensitivity of phase estimation beyond what reachable within classical ph…
Fisher Information and entanglement of non-Gaussian spin states
Helmut Strobel, Wolfgang Muessel, Daniel Linnemann +5
Entanglement is the key quantum resource for improving measurement sensitivity beyond classical limits. However, the production of entanglement in mesoscopic atomic systems has bee…