I've read a few articles on Pilot Wave theory. Part of the theory describes how particles have a deterministic path and particles can't be in two places at once. If this turned out to be true would this mean that it is impossible to build a quantum computer. As quantum computers rely on a qubit being in two places at once?
First off, quantum computing requires particles to be in 2 states at once, not 2 locations. Second, as far as I understand (and I am not an expert in the field) the mechanics behind quantum computing should still work as long as quantum entanglement exists, which it certainly does in Bohmian Mechanics.