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- W2178507225 abstract "The definition of theP-representation for certain normal states of theC *-algebra of the CCR and its consequences for a finite and an infinite number of degrees of freedom is studied. It is explicitly shown that the weight function appearing in the integral representation of the finite-dimensional density matrix can take negative values on sets of nonzero measure. For the infinite system, a probabilistic interpretation of normal states imposes consistency conditions on the family of finite-dimensional density matrices, which do not, in general, eliminate the nonpositivity of these weight functions." @default.
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- W2178507225 date "1976-01-01" @default.
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- W2178507225 title "On the nonpositivity of the diagonal coherent-state representation" @default.
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- W2178507225 doi "https://doi.org/10.1007/bf02730316" @default.
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