4 citations · 5 across the 4 of their papers we have counts for
4 papers
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…
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…
Analysis of nonperturbative fluctuations in a triple-well potential
J. Casahorran
We consider the quantum tunneling phenomenon in a well-behaved triple-well potential. As required by the semiclassical approximation we take into account the quadratic fluctuations…
Nonperturbative contributions in quantum-mechanical models: the instantonic approach
J. Casahorran
We review the euclidean path-integral formalism in connection with the one-dimensional non-relativistic particle. The configurations which allow to construct a semiclassical approx…