Holographic Definition and 111 Threads

If the holographic principle says that the the observable universe could be represented as a two dimensional surface, and we accept the idea that the universe is itself a mathematical object, and cantor showed that we could in some cases represent higher dimensional sets within lower dimensional...

I don't know where to post this so here it is. I've googled it, found something interesting by USC Graphic lab, turns out it's a rotating mirror, emulating a holographic displayer, but fair enough, it's still quite amazing. http://www.wired.com/gadgetlab/2008/06/usc-lab-creates/ Is...

What is the reason/ explanation (possibly in a nutshell!) that all the physical information of a volume can be encoded in the surface surrounding that volume?Because, you know, that sounds silly, at first! I browsed some introductory sources, but could not find any quick answers. Also, if...

Hey guys, can anyone explained to me this theory. To my knowledge it talks states that everything can be divided and broken down into the smallest bit of information. A hologram can be divided (a limited number of times?) and still retain it's image. I'm trying to do a paper on it because it's...

It is stated that in the holographic principle (e.g., in http://en.wikipedia.org/wiki/Holographic_principle) that the the description of a volume of space is encoded on a light-like boundary to the region. But with respect to which position in the volume? In a black hole, it is clear, because...

Hi, I'm new to working with gratings. From using the basic grating eqn., I'm able to model the diffraction angles for each order with different angles of incidence upon the grating and I can calculate the dispersion given a broadband source with known minimum and maximum wavelength...

I appreciate that the holographic principle is just a theory, but if I accept it and the related aspects of string theory, does it do away with the need for dark matter (since I think that the mass approaches infinity as one changes the reference frame in which one observes the the mass)...

Hi All, :smile: 1. Is it a property of all quantum gravity theories? 2. Do all string theorists and not just Susskind, Maldacena, t'Hooft, believe HP to be property of string theory? 3. As most prominent basis for Holographic Principle is associated with dependence of Black Hole Entropy...

Hi PF! I was wondering, if the holographic principle (from string theory) really can be true. I see some physical flaws in the way it works. Here is why: Suppose that the second law of thermodynamics is true. It states that for any system, the multiplicity of the system must increase, ergo...

I was watching "The Fabric of the Cosmos: What is Space?" on pbs.com, and I couldn't help but wonder a few things after looking up some information about it. I find it funny that people have been using String Theory with only two dimensions (since they are supposed to keep adding dimensions...

Hi PF members, where I can find application notes for making a small Holographic Projector? I am looking for a schematic diagram of a small, compact and reliable Holographic Projector, based on LED or Laser emitter. I am completely new on this application, so let be as more exhaustive as...

Question: Greene's "The Hidden Reality": the holographic principle On pp. 260-261 of "The Hidden Reality" Brian Greene says the following: I puzzled over this for quite awhile and it seems as though Greene, probably inadvertently, phrased this somewhat more decisively than is justified - that...

As I have seen, David Bohm was the exponent of the Holographic Universe and also the so called Holomovement. When Leonard Susskind gave a holograohic Universe solution to the information paradox, he did not credit Bohm. Nor does Lee Smolin in his book Quantum Gravity credit Bohm for saying...

Hi,I don't understand the holographic principle,how can the entire physics in a space be done on its boundary,arent we supressing a dimension and there by losing the information contained in it?,and is it neccesary that the boundary be closed?

Why does Banks liken http://arxiv.org/abs/1109.2435" :confused: Is http://arxiv.org/abs/1108.5735" ? :rolleyes:

Recent searching of the light from the quasars indicate lack of the quantum fluctuation of the spacetime. http://arxiv.org/PS_cache/arxiv/pdf/1108/1108.6005v1.pdf Does it mean the lack of quantum foam rules out the discretness of the spacetime too ? How to explain Casimir effect and...

I was reading the Scientific American latest edition and it was claimed that everything within the boundary of a particular timeframe volume can be described equally well by the projection of each event onto the surface. Is this accepted dogma? Suppose I picture (apparently I can't but...

I understand that the holographic principle applies to black holes and states that they are objects of maximum information/entropy. It states further that this information/entropy is bounded by the black hole's area rather than its volume. Apparently the holographic principle might apply to...

I've just started reading up on the holographic principle and eventually want to work my way to figuring out what Verlinde has proposed using it for. One thing I've noticed in a couple of papers is the mapping of the entropy of a black hole onto a holographic screen. Why are families of light...

Hi, I'm just trying to learn about how holographic gratings work. I see a bunch of examples that make use of a beam splitter, but I don't understand physically what a holographic grating is. Can anyone shed some light on this holographic grating? I'm hoping to have a more 3 dimensional...

Hi all, A question about the Holographic Principle. I've recently started reading up about this, and watched Bousso's neat introductory video . I thought, "Ah, this is so refreshingly simple!", and proceeded to write down my own notes. However here things revealed themselves to be not...

"The holometer"-- experimentally testing the holographic principle? Several popular-science type news sources are reporting this weekend on an experiment at Fermilab that claims to experimentally test the holographic principle.. Popsci then says a bunch of vague stuff that sounds like they...

Hi guys, I recently read some stuff about satellites in space being able to project 3D images on to the sodium layer of our atmosphere about 60 miles above the Earth. Is this possible? Can the sodium layer potentially be used as a giant movie screen for projections? The stuff i read was about...

In another thread: https://www.physicsforums.com/showthread.php?t=436080" a discussion came up relating to the validity of String Theory and the specific thought that, if nothing else, it has helped us to better understand the issues of quantum gravity. I wanted to start a new thread to adress...

Gerard 't Hooft proposes the dimensional reduction, Leonard Suskind uses the Holographic Principle in String Theory, Juan Maldacena wrotes AdS/CFT correspondence. There are hundreds articles in 2010 since Erik Verlinde wrote its "Origin of the gravity". Many astronomical phenomenons like Dark...

Hi, Today in a classical mechanics lecture, we were posed a question on whether there will be gravitational attraction between masses if the 2 masses were squashed into a 2D masses(so is flat). At first, i thought the force should still exist, since the force only depends on masses, so maybe...

I know a diffuser should be approximately bidirectional, so the "direction" isn't the important part of the question. Our application is illuminating some light sensors while we test their electrical characteristics. Like CMOS image sensors for cell phones. Long ago, we used some plastic...

Consider if you will... A pair of objects in an quantum entangled state. In such a state, observing the state of one object will determine the state of the other and thus the entangled system collapses. Therefor it seems that one object carries information about its entangled twin. A...

Hello everybody, I am Chinese. Was pleased to find this site. As an Avatar, 3D is very popular in our country So I want to know, whether in foreign holographic display technology has matured Have no business case? I want to know the specific holographic imaging naked eye. Geographical...

The observed expansion of the Universe is an example of the Holographic Principle. The galaxies escape from us not through the space but the space itself is carrying them away. Where comes the space (vacuum) from ? We know that in the holography there is an illusion of a spatial object...

Greetings to all. In my first post, I'll present an idea based on acoustical holography. I intend to design a Holographic projector using sound and laser. The hologram is created by reflecting reference laser light on a vibrating diaphragm matrix. The diaphragms are vibrated by means of...

Let's forget about the history of LQG, that means let's forget about that it has been derived from GR in an appropriate formulation (Ashtekar variabes), let's forget about the constraints that had to be implemented; then we can simply use SU(2) spin networks as the starting point for a theory of...

Can someone please explain the holographic principle to me? I'm decent in my physics and math, so you don't need to dumb things down too much :smile:

Reference: http://en.wikipedia.org/wiki/Holographic_Principle The principle states that the description of a volume of space should be thought of as encoded on a boundary to the region, preferably a light-like boundary like a gravitational horizon. For a black hole, the principle states that...

Alright, well I'm new to this, so don't yell at me for not being very good. So I was reading about the Holographic Universe Theory and is it me or is it very depressing? I mean really...if that is the truth and the world is fake and imaginary, why would you ever actually want to tell...

Hi. I read a book about 2 years ago called The Holographic Universe, written by Michael Talbot. It described David Bohm's theory that the universe is like a Hologram. He describes all matter, and everything really, in an implicate order that we cannot perceive. The implicate order is like an...

Hello, I am doing a research paper for a final and I chose the holographic principle as my topic. Does anyone have any good sources, or information pertaining to this? Any help is greatly appreciated, thank you. P.S.- I have looked at some of the first links on google, and wikipedia

We are attempting here at Illinois Wesleyan to create a holographic speckle-pattern inteferometer. We have been working at it for some time and have come to a roadblock in terms of picture quality. We're using a high quality optics table so there are no table vibrations. All of the mounts are...

The holographic principle claims that physics on the surface of a sphere determines the physics inside the volume enclosed by that sphere. And in particular, the entropy calculated from the surface of the sphere limits the entropy inside the sphere. If so, then entropy per unit volume would go...

Has anyone here heard about the new data storage medium that is being researched? Apparently it'll be able to store up to 3.9 terrabytes of data, which is insane. Anyway, I checked out this article on Wikipedia to see how it worked... http://en.wikipedia.org/wiki/Holographic_Discs...

I've been reading the book The Holographic Universe: By Michael Talbot and am attempting to find evidences for his writings in this book. He does, however, list many tests and experiments that help prove his basis, but I want to find the information of reproductive experiments that will prove or...

Hi everyone, I am curious as to the current thinking on the concept of the holographic universe. Any insights would be appreciated. Thanks in advance. I see my post has been moved. Shall I take that to mean that the holographic universe concept is no longer considered a...

If the entropy, S of a black hole is proportional to the area of the horizon, A, then, what about an observer moving with a constant velocity, v with the BH? Another observer moving with a constant acceleration with respect to the BH? After all, entropy is an invariant but area is not. So...

Which would you buy? What are the pros and cons? Which do you think will come out ahead?

now i don't know the specifics of the theory. i obvioulsy need to read up on it again or get a book, but i did a little googling earlier to try and link the two,but came up a little short. still got some reading to go, but in the mean time. is it possible in a holographic universe, for people...

I've finished reading Brian Greene's "Fabric of the Cosmos" and the last chapter intrigued me. He talks about how Hawking et al have proven that the maximum entropy inside a black hole is a function of the surface area of the BH, not the volume. This can be expanded to any volume of space...

Last week there was the Einstein Centenary conference in Paris and Padmanabhan was one of the invited speakers (with Gerard 't Hooft, Carlo Rovelli, Brian Greene, Abhay Ashtekar...) I was reading a French blogger Fabien Besnard just now, to see what of interest he had to report from the Paris...

Would it be possible to use holographic projections to make you look like something else? I mean, for example, could you project an image onto your body (With like a hand-held projector) to make you look like a different thing?

“Holographic” projector? Any idea how it works? I saw this a couple of years ago. It’s a projector that’s able to display 2D images or simulated 3D video into the air. Here’s the manufacturer’s site: http://www.io2technology.com/ The site has a few really neat videos. Any idea how this is done?

Holographic Me! i have a question: is there anyway that i and the world be holographic and if so please explain in scientific terms?