arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv math-ph/0512019math-phhep-thmath.MPquant-ph
收藏

受限一维谐振子作为双模系统

Confined One Dimensional Harmonic Oscillator as a Two-Mode System

V. G. Gueorguiev, A. R. P. Rau, J. P. Draayer

AI总结:

本研究以受限一维谐振子这一简单双模系统为对象,提出采用结合两组可解极限基集的斜基方法替代矩阵对角化求解偏离极限的问题,验证了该方法的实用性并推断其可推广至复杂原子核等更复杂系统。

摘要:

盒中一维谐振子问题可能是双模系统最简单的例子。该系统存在两个精确可解极限:谐振子与(一维)盒中粒子。两个极限各自具有特征谱结构,描述系统的两种不同激发模式。在每个极限附近,研究者可使用微扰理论实现对本征态的精确描述。然而,当偏离精确极限时,必须进行矩阵对角化,因为此时发生的基态混合通常程度过大,无法通过其他方法复现。除了采用某一组基集来表述问题外,另一种替代方案是使用同时结合两组基的“斜”基。通过在这一一维问题中研究该替代方案,我们能够阐释实际求解方法,并推断这一概念对更复杂系统的适用性,例如斜基计算已取得成功的复杂原子核研究领域。关键词:一维谐振子、盒中粒子、精确可解模型、双模系统、斜基态、微扰理论、相干态、绝热混合。

英文摘要:

The one-dimensional harmonic oscillator in a box problem is possibly the simplest example of a two-mode system. This system has two exactly solvable limits, the harmonic oscillator and a particle in a (one-dimensional) box. Each of the two limits has a characteristic spectral structure describing the two different excitation modes of the system. Near each of these limits, one can use perturbation theory to achieve an accurate description of the eigenstates. Away from the exact limits, however, one has to carry out a matrix diagonalization because the basis-state mixing that occurs is typically too large to be reproduced in any other way. An alternative to casting the problem in terms of one or the other basis set consists of using an "oblique" basis that uses both sets. Through a study of this alternative in this one-dimensional problem, we are able to illustrate practical solutions and infer the applicability of the concept for more complex systems, such as in the study of complex nuclei where oblique-basis calculations have been successful. Keywords: one-dimensional harmonic oscillator, particle in a box, exactly solvable models, two-mode system, oblique basis states, perturbation theory, coherent states, adiabatic mixing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑