virtual particles "decay exponentially" ??

In classical QM, when 'particles' propagate into a 'classically forbidden' region, wherein their energy E < V, then their wave-functions decay away exponentially, [math]\propto e^{-\left(\frac{V-E}{\hbar c}\right)x}[/math]. And, when 'particles' are "borrowed into existence", per HUP, then, in some sense, they represent a negative energy, w.r.t. the zero-energy vacuum, from which they were "borrowed". Does that cause their wave-functions, to "decay exponentially", explaining their finite propagation range, cp. Yukawa potential ??