1.1k citations
- Max Planck SocietyDE20 papers
- Austrian Academy of SciencesAT7 papers
- Institute for Quantum Optics and Quantum Information InnsbruckAT6 papers
- Ludwig-Maximilians-Universität MünchenDE4 papers
- Universität InnsbruckAT4 papers
- California Institute of TechnologyUS3 papers
- Eindhoven University of TechnologyNL3 papers
- Universidad Complutense de MadridES3 papers
- Aarhus UniversityDK2 papers
- ETH ZurichCH2 papers
- Imperial College LondonGB2 papers
- Leibniz University HannoverDE2 papers
27 papers · 1 filter
Experimental Analysis of a 4-Qubit Cluster State
Nikolai Kiesel, Christian Schmid, Ulrich Weber +4
Linear optics quantum logic operations enabled the observation of a four-photon cluster state. We prove genuine four-partite entanglement and study its persistency, demonstrating r…
Entanglement of assistance and multipartite state distillation
John A. Smolin, Frank Verstraete, Andreas Winter
We find that the asymptotic entanglement of assistance of a general bipartite mixed state is equal to the smaller of its two local entropies. Our protocol gives rise to the asympto…
Addendum to "Sufficient conditions for three-particle entanglement and their tests in recent experiments"
Geza Toth, Otfried Guehne, Michael Seevinck +1
A recent paper [M. Seevinck and J. Uffink, Phys. Rev. A 65, 012107 (2002)] presented a bound for the three-qubit Mermin inequality such that the violation of this bound indicates g…
Attosecond double-slit experiment
F. Lindner, M. G. Schaetzel, H. Walther +7
A new scheme for a double-slit experiment in the time domain is presented. Phase-stabilized few-cycle laser pulses open one to two windows (``slits'') of attosecond duration for ph…
Multipartite entanglement in spin chains
Otfried Guehne, Geza Toth, Hans J. Briegel
We investigate the presence of multipartite entanglement in macroscopic spin chains. We discuss the Heisenberg and the XY model and derive bounds on the internal energy for systems…
Entanglement Detection in the Stabilizer Formalism
Geza Toth, Otfried Guehne
We investigate how stabilizer theory can be used for constructing sufficient conditions for entanglement. First, we show how entanglement witnesses can be derived for a given state…