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http://arxiv.org/abs/0904.2287

Called "QFT as pilot-wave theory of particle creation and destruction"

Which talks mainly about Bohmian interpretations applied to QFT (the whole paper is in QFT scheme). However, in chapter 3, it talks about calculating probabilities of certain groups of particles of being in certain positions, while I read in several threads here that "particles have no positions" (this paper treats KG theory, phi4 theory, and some more in the end).

What do you think of this paper? Should I trust in it? (especially in chapter 3 and all the facts not directly related to Bohmian interpretations, which I dont care for now) Can, as this paper says, the probability of finding several particles in certain positions during certain intervals of time, be calculated? (I hope the answer is positive because I find hard to understand when someone states that "particles have no positions" when everything that I touch and see has a position!)

Thanks!!