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- W2067998047 abstract "Degeneracy of the eigenvalues of hermitian matrices is analyzed in terms of algebraic relations between the matrix elements. Only finite-dimensional matrices are considered, representing Hamiltonians of spin systems in particular.The analysis is in terms of linear relations in the space of 'diagonal' operators, i.e. a complete set of powers of the Hamiltonian. A relation is found with the theorem formulated by Von Neumann and Wigner that only the variation of three parameters of the Hamiltonian may result in a 'crossing' or degeneracy of two eigenvalues." @default.
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- W2067998047 date "2008-03-01" @default.
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- W2067998047 title "Degeneracy of the eigenvalues of hermitian matrices" @default.
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- W2067998047 doi "https://doi.org/10.1088/1742-6596/104/1/012032" @default.
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