The
holographic principle is a speculative conjecture by
Gerard 't Hooft[?] of
quantum gravity theories that all of the
information contained in a volume of
space can be represented by a theory that lives in
the boundary of that region. In other words, if you have a room then you can model
all of the events within that room by creating a theory that only takes into account
what happens in the walls of the room. The holographic principle also states that
at most there is one degree of freedom per
Planck area in that theory.
All Wikipedia text
is available under the
terms of the GNU Free Documentation License