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- University of the Basque CountryES11 papers
- Hungarian Academy of SciencesHU5 papers
- Institute for Solid State Physics and OpticsHU5 papers
- Austrian Academy of SciencesAT4 papers
- Institute for Quantum Optics and Quantum Information InnsbruckAT4 papers
- Institute of Photonic SciencesES3 papers
- Universität InnsbruckAT3 papers
- Kharkiv Institute of Physics and TechnologyUA2 papers
- Ludwig-Maximilians-Universität MünchenDE2 papers
- Max Planck Institute of Quantum OpticsDE2 papers
- Adam Mickiewicz University in PoznańPL1 paper
- European Theoretical Spectroscopy FacilityBE1 paper
6 papers · 1 filter
Practical methods for witnessing genuine multi-qubit entanglement in the vicinity of symmetric states
Geza Toth, Witlef Wieczorek, Roland Krischek +3
We present general numerical methods to construct witness operators for entanglement detection and estimation of the fidelity. Our methods are applied to detecting entanglement in…
Experimental entanglement of a six-photon symmetric Dicke state
Witlef Wieczorek, Roland Krischek, Nikolai Kiesel +3
We report on the experimental observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as 0.6540.024 and prove genuine six-photon e…
Perfect function transfer and interference effects in interacting boson lattices
Lian-Ao Wu, Adam Miranowicz, XiangBin Wang +2
We show how to perfectly transfer, without state initialization and remote collaboration, arbitrary functions in interacting boson lattices. We describe a possible implementation o…
Entanglement and permutational symmetry
Geza Toth, Otfried Gühne
We study the separability of permutationally symmetric quantum states. We show that for bipartite symmetric systems most of the relevant entanglement criteria coincide. However, we…
Entanglement detection
Otfried Gühne, Geza Toth
How can one prove that a given state is entangled? In this paper we review different methods that have been proposed for entanglement detection. We first explain the basic elements…
Spin squeezing and entanglement
Geza Toth, Christian Knapp, Otfried Gühne +1
What is the relation between spin squeezing and entanglement? To clarify this, we derive the full set of generalized spin squeezing inequalities for the detection of entanglement.…