243 citations · 548 across the 8 of their papers we have counts for
8 papers
Absolutely Maximally Entangled Qudit Graph States
Wolfram Helwig
Absolutely maximally entangled (AME) states are multipartite entangled states that are maximally entangled for any possible bipartition. In this paper, we study the description of…
Absolutely Maximally Entangled States: Existence and Applications
Wolfram Helwig, Wei Cui
We investigate absolutely maximally entangled (AME) states, which are multipartite quantum states that are maximally entangled with respect to any possible bipartition. These stron…
Absolute Maximal Entanglement and Quantum Secret Sharing
Wolfram Helwig, Wei Cui, Arnau Riera +2
We study the existence of absolutely maximally entangled (AME) states in quantum mechanics and its applications to quantum information. AME states are characterized by being maxima…
Bounds on probability of transformations between multi-partite pure states
Wei Cui, Wolfram Helwig, Hoi-Kwong Lo
For a tripartite pure state of three qubits, it is well known that there are two inequivalent classes of genuine tripartite entanglement, namely the GHZ-class and the W-class. Any…
Optimised generation of heralded Fock states using parametric down conversion
Agata M. Branczyk, T. C. Ralph, Wolfram Helwig +1
The generation of heralded pure Fock states via spontaneous parametric down conversion (PDC) relies on perfect photon-number correlations in the output modes. Correlations in any o…
Multi-mode states in decoy-based quantum key distribution protocols
Wolfram Helwig, Wolfgang Mauerer, Christine Silberhorn
Every security analysis of quantum key distribution (QKD) relies on a faithful modeling of the employed quantum states. Many photon sources, like for instance a parametric down con…