So, say you have an atom, and it emits a photon.
Then it travels through a wormhole, in time to
arrive at another location where it absorbs the
same photon it emitted earlier. Now, for the photon,
no time passes; it essentially forms a bridge
instantaneously linking the emitting and absorbing
atoms along a separation of zero space and zero time.
But in this case, the photon is seeing one atom
duplicated into two, and straddles the gap between
them. As far as the photon is concerned, this event
can only happen if the atom can be in two locations
at the same time. I suspect this is one of those
situations which aren't allowed. It looks like mass/energy
is not conserved. At least, in the universe wherein
the photon exists, there is an extra atom, so there
is more mass than in our universe...
of course, that universe exists for zero time, so
perhaps it's OK...
There may be other paradoxen spawned here which I'm
not seeing... For one thing, the atom is directly
coupled to its own future, so in some sense the future
seems predestined, although the communication is
only one way, so I don't see a time sequence paradox
which can be extracted there.
