holographic principle

Can anyone give me a basic definition of what the "Holographic Principle"
is, exactly?

S.B.

"Sirius Black" writes:

Can anyone give me a basic definition of what the "Holographic Principle"
is, exactly?

This is really a "quantum physics" question, not a "space" question,
but basically it Gerard 't Hooft's twofold conjecture, inspired by
Plato's "Cave" metaphor, that:

1.) All the quantum information that can be contained _within_ a region
of space can be completely described by the information that can be
specified on the _boundary_ of that region of space, and

2.) The amount of quantum information that can be specified on that
boundary can represent at most one quantum degree of freedom per
"planck area"

The names is chosen vageuly in analogy with the fact that a hologram, which
is a two-dimensional object, can provide an (approximate) representation of
a portion of the three-dimensional wavefronts generated by reflection of a
coherent light source off a three-dimensional object.

BTW, you could have quit easily learned this yourself simply by googling on
the exact phrase "Holographic Principle."


-- Gordon D. Pusch

perl -e '$_ = \n"; s/NO\.//; s/SPAM\.//; print;'

First off all, thank you for your answer on my post.

I also must you, before I continiu, apologize for my bad English. Hope you
can understand me.

BTW, you could have quit easily learned this yourself simply by googling
on
the exact phrase "Holographic Principle."


Yes I am. But... I also find bunch of infomations like:" our Universe is
just illusion", "holographic Universe is ultimate proof for things like psi
phenomenons, near death exspirience, out of body exspirience, for life after
death etc., etc... I don't see any connections with "holographic Universe"
and phenomenons above, but...

This is the reason why I put my post on the NG. I am still not clear with
all this.

Anyway, thank you again for your answer.

Best regards,


S.B.

In article ,
(Gordon D. Pusch) wrote:

"Sirius Black" writes:

1.) All the quantum information that can be contained _within_ a region
of space can be completely described by the information that can be
specified on the _boundary_ of that region of space, and

2.) The amount of quantum information that can be specified on that
boundary can represent at most one quantum degree of freedom per
"planck area"


Well... what about a volume whose surface is shaped like a fractal, and
therefore has arbitrarily high surface area? (e.g. human lungs,
circulatory system, etc.) Does this get around the holographic
principle? And how invariant is the principle under
topologically-invariant transformations that change the surface area?
(like transforming a fractal volume into a sphere, or vice-versa?)

Ben

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Ben Weiss | Any technology distinguishable from magic
President & CTO | is insufficiently advanced.
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