A Normal and Standard Form Analysis of the JWKB Asymptotic Matching Rule via the First Order Bessel’s Equation

[摘要] Traditional first order JWKB method (= : ( J W K B )1 ) is a conventional semiclassical approximation method mainly used in quantum mechanical systems for accurate solutions.( J W K B )1 general solution of the Time Independent Schrodinger’s Equation (TISE) involves application of the conventional asymptotic matching rules to give the accurate wavefunction in the Classically Inaccessible Region (CIR) of the related quantum mechanical system. In this work, Bessel Differential Equation of the first order (= : ( B D E )1 ) is chosen as a mathematical model and its( J W K B )1 solution is obtained by first transforming into the normal form via the change of independent variable. The( J W K B )1 general solution for appropriately chosen initial values in both normal and standard form representations is analyzed via the generalized( J W K B )1 asymptotic matching rules regarding theS ˜ i jmatrix elements given in the literature. Instead of applying the common( J W K B )1 asymptotic matching rules relying on the physical nature of the quantum mechanical system, i.e., a physically acceptable (normalizable) wavefunction, a pure semiclassical analysis is studied via the( B D E )1 model mathematically. Finally, an application to a specific case of the exponential potential decorated quantum mechanical bound state problem is presented.

[学科分类] 计算数学

[关键词] WKB;JWKB;asymptotic modification;asymptotic matching;exponential potential decorated bound state problems;Schrodinger’s equation;st;ard form;normal form;Bessel functions