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Исследование решений квазистационарных состояний для квазипотенциального уравнения

Исследование решений квазистационарных состояний для квазипотенциального уравнения

Abstract

The excited states of quantum systems are nonstationary, and they break up. These states are called unstable or quasi-stationary. Such states are already observed in the study of scattering problems, the accumulation of particles in the lens (the particle prefers to live inside the lens) is accompanied by a large delay τ (the lifetime of the quasi-level). Here the lifetime of the quasi-level τ = γ−1, width of the quasi-level Г = ~γ and complex energy level E = E1 − iE2,E2 = Γ/2. Investigation of the quasi-stationary states is carried out for the quasi-potential equation with piecewise-constant potentials at various values of the parameter of the equation ε and the potential parameters. A comparative analysis of solutions of the quasi-potential equation for the different values of ε with the solutions of the Schredinger equation is performed. Found that at ε → 0 the solutions of quasi-potential equation tend to the solutions of the Schredinger equation.

Возбуждённые состояния квантовых систем нестационарны, и они распадаются. Эти состояния называют нестабильными, или квазистационарными. Такие состояния наблюдаются уже при изучении задач рассеяния, накопление частиц в рассеивателе (частица предпочитает жить внутри рассеивателя) сопровождается большой задержкой τ (время жизни квазиуровня). Время жизни квазиуровня τ = γ−1, ширина квазиуровня Г = ~γ, комплексная энергия уровня E = E1 − iE2, E2 = Г/2. В работе проведено исследование решений квазистационарных состояний для квазипотенциального уравнения с кусочно-постоянными потенциалами при различных значениях параметра ε, входящего в уравнение и параметров потенциала. Проведён сравнительный анализ решений квазипотенциального уравнения при различных значения ε c решениями уравнения Шрёдингера. Установлено, что при ε → 0 решения квазипотенциального уравнения стремятся к решениям уравнения Шрёдингера.

Keywords

КВАЗИСТАЦИОНАРНЫЕ СОСТОЯНИЯ,QUASISTATIONARY STATES,КВАЗИПОТЕНЦИАЛЬНОЕ УРАВНЕНИЕ,QUASIPOTENTIAL EQUATION,ОПЕРАТОР СДВИГА,SHIFT OPERATOR,КУСОЧНО-ПОСТОЯННЫЕ ПОТЕНЦИАЛЫ,PIECEWISE CONSTANT POTENTIALS

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze