All DM models are RUCAs. Since RUCAs are reversible, information is conserved. This poses an interesting problem with regard to things, such as particles, that move. The problem is that seemingly empty DP space is full of information. Consider a small closed system, consisting of a box with 30 grams of Helium in it. It would contain about 6x1023 He molecules all flying about and colliding; obeying the laws of statistical mechanics. Every molecule carries trajectory information; its position and velocity. The paths of the molecules look random. The information process in DP space is similar. Instead of molecules, there are particles. Ordinary physics assumes that the vacuum is not made of nothing as is clear from the fact that every so often a pair of particles can be promoted up from the vacuum. For QED to be an accurate theory it must take such processes into account. On the other hand, DP argues that particles carry a considerable amount of information, which is a conserved quantity. That is the kind of problem that encouraged the DP point of view that only particles can represent trajectory information. As a consequence DP might imply the existence of new particles in addition to those that are currently known. The DP vacuum needs particles beyond ordinary fermions and bosons since all particle interactions must balance trajectory information before and after every event.
The alternative to positing new particles is to assume that the vacuum is full of some kind of microscopic non-particle activity, requires stable particles to be much more robust, as they have to resist interacting with a random vacuum. A particle is an entity with machinery that must travel through that “empty” yet busy space. The complexity of a stable particle able to safely advance into any kind of unknowable vacuum state is somewhat greater than one that can advance into a simple vacuum while fending off other particles that it will not interact with. We go back to Occam’s Razor and simplicity and choose to first think about the all particle approach with a simple vacuum. We know of no experimental evidence that indicates the better approach.
We should keep in mind 2 constraints: The passage of a particle must not violate conservation of information as it passes through space, and the passage through other information in space cannot interfere with the conservation of information in the particle. Except for particle interactions, the gross informational process that actually moves the particle through space must remain largely unaffected by the state of that space. Physics must allow for both interaction and superposition. What DP needs is some kind of superposition process. In ordinary physics, where things can be linear and where values can be continuous, superposition occurs naturally and beautifully. In simple Cellular Automata, with rules like the XOR rule, there is another wonderful kind of superposition principle. In DM, where the atom of motion is a swap, we find a third kind of superposition that accomplishes the same effect but by totally different means. Esthetically, the hydrodynamic model of a sphere moving through a fluid seems difficult (but not impossible) for simple mechanisms in the DM model. Instead, DM has a new and totally different model of motion and superposition. We call that process “Earthworm Motion” or EM.
Microscopically, the motion of a particle, in this DM model, is made up of a great many swaps of the states of neighboring cells. If you think about the leading edge of an advancing particle, you can see that as the Bits in the particle cells are swapped forwards into the empty space in front, the Bits from the empty space are swapped backwards into the particle! This swapping process continues so that at the trailing edge of the particle, when the last Bits belonging to the particle advance by being swapped forwards, Bits that had been empty space are swapped back into now again empty space. This means that of the gross volume that belongs to a particle, most of the cells in that volume belong to the empty space that the particle is passing through. In some way, the machinery of such a particle must be limited to only a fraction of the Bits that are in the space containing the particle. Of course EM must be a factor in the kind of superposition that takes place when various particles are sharing the same volume of space. Clues as to how this might work can be garnered by thinking about the differences in how this must happen between fermions and how it must happen between bosons.
There may be fairly simple ways to conduct experiments that could detect the existence of Earthworm Motion but the EM concept is not a necessary part of all DM models.
