相干态变换与Clifford分析中的Weyl方程
Coherent State Transforms and the Weyl Equation in Clifford Analysis
摘要：
我们研究了一个变换，受相干态变换的启发，从Clifford代数值平方可积函数$L^2({\mathbb R}^m,dx)\otimes {\mathbb C}_{m}$的Hilbert空间到${\mathbb R}^{m+1}= {\mathbb R} \times {\mathbb R}^m$上的Weyl方程的解的Hilbert空间，即到${\mathbb R}^{m+1}$上的${\mathbb C}_m$值单演函数的Hilbert空间${\mathcal M}L^2({\mathbb R}^{m+1},dμ)$，它们是关于适当测度$dμ$的$L^2$。我们证明了这种变换是希尔伯特空间的酉同构，因此它是Clifford分析的Segal-Bargmann变换的模拟。作为推论，我们得到了${\mathbb R}^{m+1}$上单演函数的一个标准正交基.我们还研究的情况下，当${\mathbb R}^m$是由$m$ -环面${\mathbb T}^m.$量子力学取代，这种扩展建立了酉等价的薛定谔表示$M$，$M={\mathbb R}^m$和$M={\mathbb T}^m$，与一个代表的希尔伯特空间${\mathcal M}L^2({\mathbb R} \times M,dμ)$的时空${\mathbb R}\times M$的Weyl方程的解决方案。
英文摘要：
We study a transform, inspired by coherent state transforms, from the Hilbert space of Clifford algebra valued square integrable functions $L^2({\mathbb R}^m,dx)\otimes {\mathbb C}_{m}$ to a Hilbert space of solutions of the Weyl equation on ${\mathbb R}^{m+1}= {\mathbb R} \times {\mathbb R}^m$, namely to the Hilbert space ${\mathcal M}L^2({\mathbb R}^{m+1},dμ)$ of ${\mathbb C}_m$-valued monogenic functions on ${\mathbb R}^{m+1}$ which are $L^2$ with respect to an appropriate measure $dμ$. We prove that this transform is a unitary isomorphism of Hilbert spaces and that it is therefore an analog of the Segal-Bargmann transform for Clifford analysis. As a corollary we obtain an orthonormal basis of monogenic functions on ${\mathbb R}^{m+1}$. We also study the case when ${\mathbb R}^m$ is replaced by the $m$-torus ${\mathbb T}^m.$ Quantum mechanically, this extension establishes the unitary equivalence of the Schrödinger representation on $M$, for $M={\mathbb R}^m$ and $M={\mathbb T}^m$, with a representation on the Hilbert space ${\mathcal M}L^2({\mathbb R} \times M,dμ)$ of solutions of the Weyl equation on the space-time ${\mathbb R}\times M$.
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