Can a 3d holographic universe exist in 3d?

In summary: The holographic interpretation is useful because it can simplify certain calculations and provide new insights, but it is not yet clear if it is the ultimate truth or just another way of looking at things.In summary, the holographic principle is a model that suggests our 3D universe could be encoded in 3D or 2D space, and is based on the idea that the maximum entropy in any region scales with the radius squared. It is an interpretation within the framework of string theory and provides new insights, but its validity as the ultimate truth is still uncertain.
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Suekdccia said:
In a holographic universe model, could our 3D universe be encoded in 3D and still be a holographic universe, instead of 3D information encoded in 2D space? Or is the standard model (non-holographic) of the universe already 3d information encoded into 3d space?
You are calling it a "holographic model". In black holes, maximum entropy scales with the square of the radius. Since the "holographic model" takes this to be a real and inherent limit, it is a model. But really, it is an interpretation. In other words, it is another way of looking at physics that is compatible with other ways - and those other ways are mainstream physics.

The answer to your question is in that first link - the wiki article. It describes where the 2D vs. 3D comes from:
The holographic principle was inspired by black hole thermodynamics, which conjectures that the maximal entropy in any region scales with the radius squared, and not cubed as might be expected. In the case of a black hole, the insight was that the informational content of all the objects that have fallen into the hole might be entirely contained in surface fluctuations of the event horizon. The holographic principle resolves the black hole information paradox within the framework of string theory.

Of course, you can create a 3D holographic interpretation as well. But interpretations are only as good as they are useful.
 
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1. Can a 3D holographic universe exist in 3D?

This is a commonly asked question in the field of physics and cosmology. The answer is not definitive, as there are different theories and interpretations about the nature of our universe. However, some scientists believe that the concept of a 3D holographic universe is possible.

2. What is a 3D holographic universe?

A 3D holographic universe is a theory that suggests our perceived 3D reality is actually a projection of information stored on a 2D surface, similar to how a hologram works. This theory is based on the idea that information is the fundamental building block of the universe.

3. How does the holographic principle relate to a 3D holographic universe?

The holographic principle is a concept in theoretical physics that states that the information in a volume of space can be encoded on its boundary. This principle is often used to support the idea of a 3D holographic universe, as it suggests that our 3D reality is a projection of information stored on a 2D surface.

4. What evidence supports the existence of a 3D holographic universe?

Currently, there is no direct evidence for a 3D holographic universe. However, some scientists point to the success of holographic technology and the holographic principle as supporting evidence. Additionally, some theories, such as string theory, incorporate elements of a holographic universe.

5. Could a 3D holographic universe explain the mysteries of quantum mechanics and gravity?

One of the reasons the concept of a 3D holographic universe is so intriguing is because it may provide a possible explanation for some of the mysteries of quantum mechanics and gravity. Some scientists believe that a holographic universe could potentially unify these two fundamental forces and provide a deeper understanding of the nature of our universe.

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