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#holography
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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
Korean researchers have developed a #digital holography processor that converts 2D videos into real-time 3D holograms
https://techxplore.com/news/2025-03-korean-processor-real-hologram-generation.html
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.
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
Interesting set of Quanta articles today
Clue to Quantum Gravity Sits on Surfaces of Black Holes
https://www.quantamagazine.org/the-1-clue-to-quantum-gravity-sits-on-the-surfaces-of-black-holes-20240925
If Universe Is a Hologram This Math Could Decode It
https://www.quantamagazine.org/if-the-universe-is-a-hologram-this-long-forgotten-math-could-decode-it-20240925
Can Space-Time Be Saved?
https://www.quantamagazine.org/can-space-time-be-saved-20240925
Two Faces of Space-Time
https://www.quantamagazine.org/the-two-faces-of-space-time-20240925
...
#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.
Technology Replaces Your Doc With a Virtual One — A Hologram #technology #healthcare #holograms #holography #health #patients #computers #CGI https://link.medium.com/4ntMyeLbSKb
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
We are all holographic patterns projected into spacetime. The action of #holography allows us to modulate the expression of our superposed states and entangle our holographs with other holographers. Through holographic entanglement we can build a network for the transmission of more holography via holofunk and express our technodryadic spirituality, allowing for material transcendence and orienting towards collective liberation from systems of domination
Vintage Lasers and Holograms in Tempe, Arizona
Over 100 lasers, including huge ones that look straight off a sci-fi set.#museums #holography #lasers #section-Atlas
Vintage Lasers and Holograms
"Multiramp helicoconical-OAM multiplexed #holography is proposed and experimentally implemented. The mode selectivity of the multiramp mixed screw-edge dislocations, constant parameter K, and normalized factor are investigated...The combination of the #topological charge and the other three parameters can provide a four-dimensional multiplexed holography and can enhance #information capacity."
"Theoretical physicists have long been trying to devise a complete theory of gravity that would also account for quantum mechanics phenomena, as existing models do not. Such a theory could collectively explain the many intricate physical and cosmological phenomena observed over the past decades.
Researchers recently carried out a theoretical study exploring the possibility that holography, an approach to quantum gravity that includes some features of conventional holograms, could be used to describe quantum mechanical phenomena."
#physics #holography #cosmology
https://phys.org/news/2023-06-quantum-gravity-holography-cosmological.html
Inviting all #biomedical #optical #imaging submissions for POM! A unique, free, interactive platform for #photonics researchers. Great exposure across continents. 
Submit at https://t.co/cMuS70YeEm. Abstract deadline: July 27. Conference: Nov 13-14. Join us! #POM2023 #Fluorescence #AdaptiveOptics #Photoacoustic #Photothermal #Raman #Brillouin #Holography #OCT #DOT
'A Footbridge of Memory' in Warsaw, Poland
At night, this memorial illuminates a ghostly outline of a footbridge that connected two sections of the Warsaw Ghetto.
'A Footbridge of Memory'
Theoretical #physics episode (1-hour) with Mark Van Raamsdonk from the Department of Physics & Astronomy at the University of British Columbia, Ana Alonso-Serrano, Leonard Susskind, and Brian Green. The title is 'Einstein and the Quantum: Entanglement and Emergence'. The episode builds up slowly, culminating in a discussion of how the concept of #holography is bridging quantum mechanics and gravity.
https://youtu.be/ntxC5KMC4y0