Free particle wave function in light of the minimum-length deformed quantum mechanics and some of its phenomenological implications

At a fundamental level the notion of particle (quantum) comes from quantum field theory. From this point of view we estimate corrections to the free particle wave function due to minimum-length deformed quantum mechanics to the first order in the deformation parameter. Namely, in the matrix element $⟨0|\mathit{\Phi }(t,\mathbf{x})|\mathbf{p}⟩$ that in the standard case sets the free particle wave function $\propto \exp (i[\mathbf{p}\mathbf{x}-\epsilon (\mathbf{p})t])$ there appear three kinds of corrections when the field operator is calculated by using the minimum-length deformed quantum mechanics. Starting from the standard (not modified at the classical level) Lagrangian, after the field quantization we get a modified dispersion relation, and besides that we find that the particle’s wave function contains a small fraction of an antiparticle wave function and the backscattered wave. The result leads to interesting implications for black hole physics.