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Theorem of Levinson Via The Spectral Density
L. J. Boya, J. Casahorran
We deduce Levinson\'{}s theorem in non-relativistic quantum mechanics in one dimension as a sum rule for the spectral density constructed from asymptotic data. We assume a self-adj…
Deduction of Planck's Formula from Multiphoton States
Luis J. Boya, Ian M. Duck, E. C. G. Sudarshan
We obtain the black body radiation formula of Planck by considering independent contributions of multiphoton states
Density Matrices and Geometric Phases for n-state Systems
Luis J. Boya, Mark Byrd, Mark Mims +1
An explicit parameterization is given for the density matrices for -state systems. The geometry of the space of pure and mixed states and the entropy of the -state system is…
Strictly isospectral supersymmetry and Schroedinger general zero modes
L. J. Boya, H. Rosu, A. J. Segui-Santonja +1
The connection between the strictly isospectral construction in supersymmetric quantum mechanics and the general zero mode solutions of the Schroedinger equation is explained by in…