0107152v1

related topics
{time, wave, function}
{equation, function, exp}
{force, casimir, field}
{wave, scattering, interference}
{particle, mechanics, theory}
{error, code, errors}
{let, theorem, proof}
{energy, gaussian, time}

Total Absorption in Finite Time in an $i\delta$ Potential

A. Marchewka, Zeev Schuss

abstract: We consider the evolution of Green's function of the one-dimensional Schr\"odinger equation in the presence of the complex potential $-ik\delta(x)$. Our result is the construction of an explicit time-dependent solution which we use to calculate the time-dependent survival probability of a quantum particle. The survival probability decays to zero in finite time, which means that the complex delta potential well is a total absorber for quantum particles. This potential can be interpreted as a killing measure with infinite killing rate concentrated at the origin.

oai_identifier:
oai:arXiv.org:quant-ph/0107152
categories:
quant-ph
comments:
8 pages, no figures, we would welcome comments
arxiv_id:
quant-ph/0107152
created:
2001-07-30

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