>VITAE:
Barbara Kraus finished her PhD, entitled "Entanglement Properties
of Quantum States and Quantum Operations", at the University of
Innsbruck under the supervision of J. Ignacio Cirac. After working
for two years at the MaxPlanckInstitute for Quantum Optics, Garching, Germany
she spent two postdoc years in the group of Nicolas Gisin
at the University of Geneva. In 2006 she moved back to Innsbruck,
where she is currently working as a senior postdoc in the group of Hans Briegel at the Institute
of Theoretical Physics. Her main research interests are the theory
of entanglement, quantum optical implementations of quantum
information processors, quantum Kolmogorov complexity, quantum
computation and simulations, and quantum cryptography.



We introduce a new, physically motivated, classification
of pure quantum states describing n qubits. We characterize all
multipartite states which can be maximally entangled to local
auxiliary systems using controlled operations. A state has this
property iff one can construct out of it an orthonormal basis by
applying independent local unitary operations. This implies that
those states can be used to encode locally the maximum amount of n
independent bits. Examples of these states are the socalled
stabilizer states, which are used for quantum error correction and
oneway quantum computing. We give a simple characterization of
these states and construct a complete set of commuting unitary
observables which characterize the state uniquely. Furthermore, we
show how these states can be prepared and discuss their
applications.
C. Kruszynska and B. Kraus, Multipartite Entanglement and Global
Information, arXiv: quantph/08083862 (2008), accepted at Phys.
Rev. A.
