Quantum computation and quantum information
Quantum computation and quantum information
Unbounded-error classical and quantum communication complexity
ISAAC'07 Proceedings of the 18th international conference on Algorithms and computation
Separability criteria based on the bloch representation of density matrices
Quantum Information & Computation
Quantum Information & Computation
Unbounded-error one-way classical and quantum communication complexity
ICALP'07 Proceedings of the 34th international conference on Automata, Languages and Programming
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Bloch-vector spaces for N-level systems are investigated from the spherical-coordinate point of view in order to understand their geometrical aspects. We present a characterization of the space by using the spectra of (orthogonal) generators of SU(N). As an application, we find a dual property of the space which provides an overall picture of the space. We also provide three classes of quantum-state representations based on actual measurements and discuss their state-spaces.