## Is the universe a hologram?

Provided by Florian Aigner, Vienna University of Technology At first glance, there is not the slightest doubt: to us, the universe looks three dimensional. But one of the most fruitful theories of theoretical physics in the last two decades is challenging this assumption. The "holographic principle" asserts that a mathematical description of the universe actually requires one fewer dimension than it seems. What we perceive as three dimensional may just be the image of two dimensional processes on a huge cosmic horizon. Up until now, this principle has only been studied in exotic spaces with negative curvature. This is interesting from a theoretical point of view, but such spaces are quite different from the space in our own universe. Results obtained by scientists at TU Wien (Vienna) now suggest that the holographic principle even holds in a flat spacetime. The Holographic Principle Everybody knows holograms from credit cards or banknotes. They are two dimensional, but to us they appear three dimensional.

### Is the universe a hologram?

Describing the universe requires fewer dimensions than we might think. New calculations show that this may not just be a mathematical trick, but a fundamental feature of space itself.

**Mon 27 Apr 15** from Phys.org

Is the universe a hologram, Tue 28 Apr 15 from SpaceDaily

Is the universe a hologram?, Mon 27 Apr 15 from Science Blog

Is the universe a hologram?, Mon 27 Apr 15 from ScienceDaily

Is the universe a hologram?, Mon 27 Apr 15 from Eurekalert

### It's still possible we all live inside a hologram

Is our universe actually just a hologram? This isn't some trippy 3am idea, but an actual physical property of the universe everything exists in.

**Mon 27 Apr 15** from Extremetech

### Is the universe 3-D? Or just a hologram?

Brooks HaysVIENNA, April 27 (UPI) -- New research suggests the cosmos can be mathematically explained using just two dimensions -- that the universe is actually a hologram.

**Mon 27 Apr 15** from UPI

### Universe could be a hologram, study says

Provided by Florian Aigner, Vienna University of Technology At first glance, there is not the slightest doubt: to us, the universe looks three dimensional. But one of the most fruitful theories ...

**Mon 27 Apr 15** from RedOrbit

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