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- W2003625364 abstract "The totality of normalised density matrices of order N forms a convex set Q_N in R^(N^2-1). Working with the flat geometry induced by the Hilbert-Schmidt distance we consider images of orthogonal projections of Q_N onto a two-plane and show that they are similar to the numerical ranges of matrices of order N. For a matrix A of a order N one defines its numerical shadow as a probability distribution supported on its numerical range W(A), induced by the unitarily invariant Fubini-Study measure on the complex projective manifold CP^(N-1). We define generalized, mixed-states shadows of A and demonstrate their usefulness to analyse the structure of the set of quantum states and unitary dynamics therein." @default.
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- W2003625364 date "2011-07-21" @default.
- W2003625364 modified "2023-10-16" @default.
- W2003625364 title "Numerical shadow and geometry of quantum states" @default.
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- W2003625364 doi "https://doi.org/10.1088/1751-8113/44/33/335301" @default.
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