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arXiv · 2510.18675

On path integrals for wave functions taking $p$-adic values

Su Hu·Min-Soo Kim
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Abstract

In this paper, we construct a $p$-adic path integral via $p$-adic multiple integrals. This integral describes the evolution of a wave function $\Psi(x)$, defined as a map from a domain in $\mathbb{C}_p$ to $\mathbb{C}_p$. Unlike the standard $p$-adic quantum mechanics formulated for functions $\mathbb{Q}_p \to \mathbb{C}$, our construction works directly on $\mathbb{C}_p$-valued wave functions. Using $p$-adic Dirac delta measures and $p$-adic additive characters, we define the propagator as a finite-partition multiple integral, which allows explicit iterative integration. As an application, we compute the Feynman propagator for free particles and obtain a closed-form expression analogous to the classical counterpart. Our method provides a discrete, constructive alternative that complements the existing distribution-theoretic frameworks for $p$-adic functional integration.

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Su Hu, Min-Soo Kim. 2025-10-21. On path integrals for wave functions taking $p$-adic values. https://arxiv.org/abs/2510.18675

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