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- W2617364034 abstract "An algebraic procedure to find extremal density matrices for the expectation value of a finite Hamiltonian matrix is established. The extremal density matrices for pure states provide a complete description of the system, that is, its corresponding energy spectrum and projectors. For density matrices representing mixed states, one gets the most probable eigenstates that yield extremal mean values of the energy. The procedure uses mainly the stationary solutions of the von Neumann equation of motion, the orbits of the Hamiltonian, and the positivity conditions of the density matrix. The method is illustrated for matrix Hamiltonians of dimensions d = 2 and d = 3." @default.
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- W2617364034 date "2017-05-26" @default.
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- W2617364034 title "Extremal Density Matrices for the Expectation Value of a Qudit Hamiltonian" @default.
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- W2617364034 doi "https://doi.org/10.1088/1742-6596/839/1/012012" @default.
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