Dirac方程的完全解族:双复伪解析函数理论和嬗变算子的应用
Complete families of solutions for the Dirac equation: an application of bicomplex pseudoanalytic function theory and transmutation operators
摘要:
考虑了具有标量和电磁势的Dirac方程。在时间谐波的情况下,当所有涉及的函数只依赖于两个空间变量时,它简化为一对解耦的双复Vekua型方程[8]。利用复Vekua方程的技术,在附加条件下,特别是当电磁势不存在且标量势是一个Cartesian变量的函数时,构造了双复方程的精确解。通过引入一个与Cauchy-Riemann方程相关的双复Vekua方程的变形算子,我们证明了相应于所构造解族的展开定理和Runge逼近定理。
英文摘要:
The Dirac equation with a scalar and an electromagnetic potentials is considered. In the time-harmonic case and when all the involved functions depend only on two spatial variables it reduces to a pair of decoupled bicomplex Vekua-type equations [8]. Using the technique developed for complex Vekua equations a system of exact solutions for the bicomplex equation is conctructed under additional conditions, in particular when the electromagnetic potential is absent and the scalar potential is a function of one Cartesian variable. Introducing a transmutation operator relating the involved bicomplex Vekua equation with the Cauchy-Riemann equation we prove the expansion and the Runge approximation theorems corresponding to the constructed family of solutions.
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