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quant-ph2005
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…
quant-ph2002★ 1 cited
The Instantonic Approach with Non-Equivalent Vacua
J. Casahorran
We study the quantum-mechanical tunneling phenomenon in models which include the existence of non-equivalent vacua. For such a purpose we evaluate the euclidean propagator between…