Time doesn’t work for anti-matter as it does for matter (Amjor, Jurkiewicz, & Loll, 2008). Strange as it seems, the Feynman diagram of an electron colliding with an anti-electron shows the latter going backwards in our time (Figure 4.8), yet both the electron and anti-electron are entering the collision not leaving it.
Does this time reversal reverse causality? Minkowski interpreted Einstein’s theory so that objects move in time dimension, to allow a block theory of time, where every event that ever was or will be can be paged like a book (Barbour, 1999). If time is a dimension, an entity going backwards in time reverses causality, but the anti-electron in Figure 4.8 is entering the collision just as the electron is, so there is no causal reversal. Assuming that time is a dimension then doesn’t explain how anti-matter time works.
Einstein argued that every object in the universe has its own clock, so there is no space-time canvas upon which objects exist. In processing terms, time varies because every point in the network runs at its own rate. Time then ticks by for matter as clockwise cycles complete but for anti-matter, time ticks by as anti-clockwise cycles complete. Anti-matter then exists in anti-time as matter exists in time because its processing runs in reverse. It follows that to a matter entity, anti-matter runs time in reverse, but to the anti-matter entity, matter is running time in reverse. Anti-matter exists by anti-processing as matter exists by processing, so both their times pass as processing cycles complete.
Note that time can run in reverse because it is virtual, so Feynman diagrams need two time axes, one for matter and one for anti-matter. Time based on processing has a direction, so every entity in our universe has not only its own clock but also its own clock direction.
If time is virtual, can we reverse it, as the Back button of an Internet browser does? The browser back button can undo your last act, but it can’t undo interactions like online registrations. This would require both parties to undo, and with six degrees of separation, rolling back six events for one person could affect the entire web, so rolling back your time could require the entire network to roll-back!
Neither time nor anti-time can be reversed because a physical event is a reboot that can’t be undone. Anti-matter runs anti-time between physical events, but it can no more undo a physical event than matter can. Time then can’t be reversed, rewound, or fast-forwarded, whether by matter or anti-matter, so time travel is a fantasy.