30 citations · 174 across the 15 of their papers we have counts for
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quant-ph2012★ 5 cited
Negative time delay for wave reflection from a one-dimensional semi-harmonic well
Oscar Rosas-Ortiz, Sara Cruz y Cruz, Nicolas Fernandez-Garcia
It is reported that the phase time of particles which are reflected by a one-dimensional semi-harmonic well includes a time delay term which is negative for definite intervals of t…
math-ph2012★ 30 cited
Dynamical Equations, Invariants and Spectrum Generating Algebras of Mechanical Systems with Position-Dependent Mass
Sara Cruz y Cruz, Oscar Rosas-Ortiz
We analyze the dynamical equations obeyed by a classical system with position-dependent mass. It is shown that there is a non-conservative force quadratic in the velocity associate…