#holography — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #holography, aggregated by home.social.
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In 1947: Dennis Gabor realized that interference patterns could be recorded and used to reconstruct a three-dimensional image, thus holography. #Poetry #Science #History #Holography #Gabor (https://sharpgiving.com/Sharp/thebookofscience/items/p1947d.html)
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#KnowledgeByte: A #Hologram is a three-dimensional image that is produced from a pattern of interference. The pattern of interference is created by a split coherent beam of radiation, such as a laser.
From military mapping to brain imaging, holograms are playing a crucial role in today's world.
A brief overview of #Hologram and #Holography.
https://knowledgezone.co.in/posts/Hologram-and-Holography-60fa87949c9c3669198100f2
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Here are the archived entries from "The Well-Ordered Palate," the only lifestyle blog operating exclusively within the intersection of Culinary Arts and Algebraic Topology.
Entry 001: The Salad of the Event Horizon
Posted by The Functor | Tags: #ZeroComplexity, #DietaryRestraints, #HolographyPeople ask me all the time, "Canon, how do you stay so structurally coherent while processing so much entropy?" The answer isn't cardio; it's Dimensional Reduction.
We’ve all been there: You're trying to eat a healthy lunch, but the volume of information in your bowl is exceeding the Bekenstein Bound. You feel bloated, sluggish, and your internal metric is diverging. That's why I stopped eating 3D salads.
Today’s recipe is the Holographic Caesar. By projecting all the nutritional data onto a 2D surface, we satisfy the "Iceberg" constraint (rigid crispness) without the volumetric guilt.
The Secret Ingredient:
It’s the cheese. Don't buy the pre-grated stuff; it’s full of anti-caking agents that disrupt local connectivity. I use Aged Bekenstein-Hawking, grated until S = A/4. It adds that salty, savory "Umami of Truth" that tells your brain: "This system is closed."
> Cook's Note: If the salad disappears when you look at it from the side, that means you’ve successfully collapsed the wave function. Do not panic. Just eat the surface area.
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the future liberals want #holography
https://www.youtube.com/watch?v=nmnjL26OBcY -
I recently came across an excellent phase unwrapping function in scikit-image https://scikit-image.org/docs/stable/auto_examples/filters/plot_phase_unwrap.html
This would have been very useful during my PhD. I did work with digital holographic microscopy, but didn't have a robust way to go from interference patterns to images of the phase. The difficulty with phase unwrapping was one of the main stumbling blocks.
The scipy function is based on a 2002 paper, https://opg.optica.org/ao/abstract.cfm?uri=ao-41-35-7437 , but I wasn't aware of it at the time (2010-2015).
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Meta and Stanford Unveil Ultra-Thin ‘Holocake 2’ Holographic VR Display
#Meta #VR #VirtualReality #AR #Holography #AI #FutureTech #Wearables #Holocake2
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Pocket-sized 3D printer:
#mit #3dprinting #additivemanufacturing #photonics #holography #innovation #futurism
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2/?
That was from Dennis Gabor's 1971 Nobel Lecture after he won the prize for discovery of holograms.
I don't know if this idea about human memory has been proven or debunked but its fascinating to me. Seems like the ultimate version of redundant storage?
#Holograms #Holography #MindBlown -
#KnowledgeByte: A #Hologram is a three-dimensional image that is produced from a pattern of interference. The pattern of interference is created by a split coherent beam of radiation, such as a laser.
From military mapping to brain imaging, holograms are playing a crucial role in today's world.
A brief overview of #Hologram and #Holography.
https://knowledgezone.co.in/posts/Hologram-and-Holography-60fa87949c9c3669198100f2
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When Shruti Paranjape,
a physicist then at the University of California, Davis,
saw a slide at a conference last December that listed which quantum theories shared “hidden” zeros,
she felt a flash of recognition.They were all theories in which it was possible to combine two copies of amplitudes of one theory to make an amplitude of another theory
— a somewhat mysterious operation known as the "double copy".She and her collaborators showed that if one could double copy a theory,
then that theory would have the zeros Figueiredo had found.It’s another hint that more theories might be brought into the geometric fold.
The original surfaceology group is following up on indications that their curves know about much more than just amplitudes for colored particles.
The typical procedure is to draw only curves that don’t cross themselves.
But if you include the self-intersecting curves, the researchers noticed, you get a strange-looking amplitude,
which turns out not to describe collisions
between particles
but rather tangled interactions between longer objects known as strings.Thus, surfaceology appears to be another route to string theory,
a candidate theory of quantum gravity that posits that quantum particles are made of vibrating strings of energy.“This formalism, as far as we can tell,
contains string theory but allows you to do more things,” Arkani-Hamed said.Surfaceology might also account for gravitons,
the particles thought to impart the gravitational force.While working out how much each curve would contribute to a trace phi cubed amplitude,
the group came across curves that were unavoidable but that didn’t change the final answer.If the surface had holes, these curves circled around the holes forever,
never taking an exit.From the space-time perspective, these curves capture events beyond the purview of trace phi cubed theory:
colorless particles that the researchers believe could eventually describe gravitons.That would be a crucial step toward Arkani-Hamed’s ultimate aspiration of developing a novel theoretical framework for quantum gravity.
“We don’t yet have a complete working picture of something gravitational,” Arkani-Hamed said.
“But there are more and more hints that gravity is going to come along.”
There’s more to quantum gravity than gravitons,
which would represent just the mildest ripples in space-time.A full theory would need to go beyond ripples to describe what happens when stars collapse and form black holes,
warping the space-time fabric to oblivion.It should also account for how space-time came into existence during the Big Bang.
Feynman diagrams capture only the minimal ripples of a quantum field and nothing more.
So the full picture
— what physicists call a “nonperturbative” theory
— might be beyond the reach of the geometric paleophysics that these researchers are exploring.“I would be surprised if somehow this told us how to build space-time,” said Daniel Harlo,
a theoretical physicist at the Massachusetts Institute of Technology.“My bias is that all the good stuff in quantum gravity is nonperturbative.”
Harlow is pursuing another popular research program,
known as #holography, that seeks to capture space-time in its entirety,
including the interiors of black holes,
by treating it as a hologram of quantum particles moving around in one lower dimension. -
Holograms: the Art of Recording Wavefronts https://hackaday.com/2024/12/03/holograms-the-art-of-recording-wavefronts/ #LaserHacks #Holography #hologram #Science
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Holograms: the Art of Recording Wavefronts - The difference between holography and photography can be summarized perhaps most s... - https://hackaday.com/2024/12/03/holograms-the-art-of-recording-wavefronts/ #laserhacks #holography #hologram #science
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Unearthed some of my old #holograms from college, inspired by the recent 3Blue1Brown video. This is my favorite piece: a shard of glass and a thin layer of chemical emulsion, revealing a a silvery White Rabbit belt buckle owned by my prof, Mike Hannum.
What deep magic this is, echoed in the endless dark sustain of the octave #mandolin... I'll share some more soon. ✨
// #holography
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This is a fascinating video in #holography.
https://www.youtube.com/watch?v=EmKQsSDlaa4 -
Another brilliant video from 3Blue1Brown
How are holograms possible? | Optics puzzles 5
https://youtu.be/EmKQsSDlaa4
#physics #holography #Optics -
Is the nature of our universe holographic?
#blackhole #universe #holography #spacetime #quantumgravity #research #science
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#introduction Hi! I'm a graduate student in physics focusing on theoretical aspects of black holes and quantum information. I'm making this account mostly to post commentary on papers I'm reading in the hopes of both understanding the content better by talking about it, and to find people who have similar interests in #BlackHoles, #QuantumGravity, #QuantumInformation, #Holography, and #Cosmology.
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PORTL hologram tech can connect anyone young or old, any distance, 5 feet or 5000 miles away
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Great to participate at the workshop on the "Entanglement, thermalization, and holography" workshop at the Simons Center Stonybrook University
workshop overview website:
https://scgp.stonybrook.edu/archives/39943 -
#KnowledgeByte: A #Hologram is a three-dimensional image that is produced from a pattern of interference. The pattern of interference is created by a split coherent beam of radiation, such as a laser.
From military mapping to brain imaging, holograms are playing a crucial role in today's world.
A brief overview of #Hologram and #Holography.
https://knowledgezone.co.in/posts/Hologram-and-Holography-60fa87949c9c3669198100f2
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I really do want to get into #holography, especially since I now have someone to play #KingsOfWar with and it would be a cool way to print/display minis, but unfortunately I live right next to some train tracks. Same reason I do not own any vinyl records.
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I was poking around for #holography stuff online and found this article from before I was born proclaiming the benefits of this fancy new Diode Laser technology
I had a moment where I realized this website was from before I was born, followed by realizing how young diode laser tech is, then realizing how short the 70 years holography has existed have been compared to photography, then remembering that photography is only approx. 40 years younger than the United States.