F. E. S. Steinhoff
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View article: Implementation and representation of qudit multi-controlled unitaries and hypergraph states by N-body angular momentum couplings
Implementation and representation of qudit multi-controlled unitaries and hypergraph states by N-body angular momentum couplings Open
We construct a representation of qudit multi-controlled unitary operators in terms of N-body angular momentum interactions. The representation is particularly convenient for odd-dimensional systems, with interesting connections to the Pegg…
View article: Multipartite entanglement classes of a multiport beam-splitter
Multipartite entanglement classes of a multiport beam-splitter Open
The states generated by a multiport beam-splitter usually display genuine multipartite entanglement between the many spatial modes. Here we investigate the different classes of multipartite entangled states that arise in this practical sit…
View article: Multipartite states under elementary local operations
Multipartite states under elementary local operations Open
Multipartite pure states are equivalent under Stochastic Local Operations and\nClassical Communication (SLOCC) whenever they can be mapped into one another by\nInvertible Local Operations. It is shown that this is equivalent to the\ninter-…
View article: Qudit hypergraph states
Qudit hypergraph states Open
We generalize the class of hypergraph states to multipartite systems of qudits, by means of constructions based on the d-dimensional Pauli group and its normalizer. For simple hypergraphs, the different equivalence classes under local oper…
View article: Converting Nonclassicality into Entanglement
Converting Nonclassicality into Entanglement Open
Quantum mechanics exhibits a wide range of nonclassical features, of which entanglement in multipartite systems takes a central place. In several specific settings, it is well known that nonclassicality (e.g., squeezing, spin squeezing, co…
View article: Contextuality in Phase Space
Contextuality in Phase Space Open
We present a general framework for contextuality tests in phase space using displacement operators. First, we derive a general condition that a single-mode displacement operator should fulfill in order to construct Peres-Mermin square and …