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Category: holograms – Page 10

China Shows Off High-Powered Laser That Can ‘Write’ In The Air

Movie plots often use holograms to give the scene a scientific or cooler essence. However, researchers have made these futuristic scenes a reality. According to reports, Scientists in China showcased a laser that can create Chinese characters out of thin air.

Although lasers often have a long-range, you can only see them when the light lands on a surface. However, dust particles made an exception. But this is entirely different and looks like something out of a sci-fi movie.

Scientists have already used lasers to create a range of optical illusions. However, it required mediums like dust and clouds to do so. But according to reports, with the new device, researchers are able to draw patterns using ultra-short laser pulses.

Theory claims to offer the first ‘evidence’ our Universe is a hologram

Year 2017 face_with_colon_three

While theories of holographic universes have been around since the 1990s, the latest study, published in the journal Physical Review Letters, contains the first proof, the researchers say.

To find the ‘evidence’, the researchers developed models of the holographic Universe that can be tested by peering back in time as far as 13 billion years, at the furthest reaches of the observable Universe. These models depend on the theory of quantum gravity, a theory that challenges the accepted version of classical gravity. The holographic principle says gravity comes from thin, vibrating strings which are all holograms of a flat, 2D Universe.

Recent advances in telescopes and sensing equipment have allowed scientists to detect a vast amount of data hidden in the ‘white noise’ or microwaves left over from the moment the Universe was created. Using this information, the team was able to make comparisons between networks of features in the data and quantum field theory. They found some of the simplest quantum field theories could explain nearly all cosmological observations of the early Universe.

Edible holograms could decorate or even authenticate food

Year 2021 face_with_colon_three

Remember back in the mid-80s, when mass-produced holograms were such a big deal? Since then, they’ve become common on credit cards, currency and other items. Now, thanks to new research, you can actually eat the things.

First of all, why would anyone want an edible hologram? Well, along with simply being used for decorative purposes, they could conceivably also serve to show that a food item hasn’t been tampered with, or to display its name and/or ingredients in a way that proves it isn’t a counterfeit product.

Scientists have already successfully molded edible holograms into chocolate, although only certain types of chocolate worked, and a new mold had to be created for each hologram design. Seeking a more versatile alternative, researchers at the United Arab Emirates’ Khalifa University of Science started out by mixing corn syrup and vanilla with water, then letting the solution dry into a film.

Physicists Create a Holographic Wormhole Using a Quantum Computer

Physicists have purportedly created the first-ever wormhole, a kind of tunnel theorized in 1935 by Albert Einstein and Nathan Rosen that leads from one place to another by passing into an extra dimension of space.

The wormhole emerged like a hologram out of quantum bits of information, or “qubits,” stored in tiny superconducting circuits. By manipulating the qubits, the physicists then sent information through the wormhole, they reported today in the journal Nature.

The team, led by Maria Spiropulu of the California Institute of Technology, implemented the novel “wormhole teleportation protocol” using Google’s quantum computer, a device called Sycamore housed at Google Quantum AI in Santa Barbara, California. With this first-of-its-kind “quantum gravity experiment on a chip,” as Spiropulu described it, she and her team beat a competing group of physicists who aim to do wormhole teleportation with IBM and Quantinuum’s quantum computers.”

The unprecedented experiment explores the possibility that space-time somehow emerges from quantum information, even as the work’s interpretation remains disputed.

Researchers develop programmable optical device for high-speed beam steering

In a scene from “Star Wars: Episode IV—A New Hope,” R2D2 projects a three-dimensional hologram of Princess Leia making a desperate plea for help. That scene, filmed more than 45 years ago, involved a bit of movie magic—even today, we don’t have the technology to create such realistic and dynamic holograms.

Generating a freestanding 3D hologram would require extremely precise and fast control of light beyond the capabilities of existing technologies, which are based on liquid crystals or micromirrors.

An international group of researchers, led by a team at MIT, has spent more than four years tackling this problem of high-speed optical beam forming. They have now demonstrated a programmable, wireless device that can control light, such as by focusing a beam in a specific direction or manipulating the light’s intensity, and do it orders of magnitude more quickly than commercial devices.

Black Holes and Holograms: A New Theory That Changes Our Understanding of the Universe

Confusing? It may sound so, but it isn’t actually. What Benini and Milan have done is apply the theory of the holographic principle to black holes. In this way, their mysterious thermodynamic properties have become more understandable: by focusing on predicting that these bodies have high entropy and looking at them in terms of quantum mechanics, which allows us to describe them as a hologram: they have two dimensions, in which gravity disappears, but they reproduce an object in three dimensions.

But there’s more. Much more.

According to the authors of the new studies, this is only the first step towards a deeper understanding of these cosmic bodies and the properties that characterize them when quantum mechanics intersects with general relativity.

Diffraction model-informed neural network for unsupervised layer-based computer-generated holography

Learning-based computer-generated holography (CGH) has shown remarkable promise to enable real-time holographic displays. Supervised CGH requires creating a large-scale dataset with target images and corresponding holograms. We propose a diffraction model-informed neural network framework (self-holo) for 3D phase-only hologram generation. Due to the angular spectrum propagation being incorporated into the neural network, the self-holo can be trained in an unsupervised manner without the need of a labeled dataset. Utilizing the various representations of a 3D object and randomly reconstructing the hologram to one layer of a 3D object keeps the complexity of the self-holo independent of the number of depth layers. The self-holo takes amplitude and depth map images as input and synthesizes a 3D hologram or a 2D hologram. We demonstrate 3D reconstructions with a good 3D effect and the generalizability of self-holo in numerical and optical experiments.

How Real Holograms are Created by Artificial Intelligence (Lightfield)

Commercial Holograms may soon get into the hand of regular consumers with the help of the biggest Hologram company called Lightfield. Holography is a technique that enables a wavefront to be recorded and later re-constructed. Holography is best known as a method of generating three-dimensional images, but it also has a wide range of other applications. In principle, it is possible to make a hologram for any type of a light field.
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TIMESTAMPS:
00:00 No longer just Science Fiction.
00:45 What is a hologram?
02:28 How do these new Holograms work?
05:56 The Future of Entertainment?
08:17 Last Words.
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#holograms #ai #technology

Hologram Technology Allows Woman To Answer Questions At Her Own Funeral

An AI-driven chatbot technology has allowed one woman to answer questions from beyond the grave at her own funeral, with mourners able to dive into her fascinating life in a morbid but futuristic tribute. The technology was provided by her son, who runs a company that creates “holographic conversational video experiences”, and allowed Holocaust campaigner Marina Smith MBE to be “present, in a sense”, according to son Stephen Smith, reports the Telegraph.

Mrs Smith passed away in June of this year and her funeral was held shortly after in Nottinghamshire, UK. Having led a meaningful life educating people about the Holocaust, her family wished for her message to continue after her death, and the holographic experience during her funeral allowed just that.

The experience used StoryFile, an AI conversational bot that uses 20 different cameras and recordings of the subject to create a digital, holographic clone that can be interacted with. While the experience was powered by AI, the answers given to questions were entirely Mrs Smith’s own words.