Monday, December 30, 2024

Tuesday, December 24, 2024

Scientists Observe 'Negative Time' In Quantum Experiments

 

Scientists Observe 'Negative Time' In Quantum Experiments (phys.org)9

Researchers at the University of Toronto have experimentally observed "negative time" in photon interactions with atoms, suggesting a measurable effect rather than an illusion. The researchers stress that these findings, posted on the preprint server arXiv, don't imply time travel. Phys.Org reports:The experiments, conducted in a cluttered basement laboratory bristling with wires and aluminum-wrapped devices, took over two years to optimize. The lasers used had to be carefully calibrated to avoid distorting the results. [...] The explanation lies in quantum mechanics, where particles like photons behave in fuzzy, probabilistic ways rather than following strict rules.

Instead of adhering to a fixed timeline for absorption and re-emission, these interactions occur across a spectrum of possible durations -- some of which defy everyday intuition. Critically, the researchers say, this doesn't violate Einstein's theory of special relativity, which dictates that nothing can travel faster than light. These photons carried no information, sidestepping any cosmic speed limits.
"We've made our choice about what we think is a fruitful way to describe the results," said Aephraim Steinberg, a University of Toronto professor specializing in experimental quantum physics, adding that while practical applications remain elusive, the findings open new avenues for exploring quantum phenomena.

"I'll be honest, I don't currently have a path from what we've been looking at toward applications," he admitted. "We're going to keep thinking about it, but I don't want to get people's hopes up."

Wednesday, December 18, 2024

nVidia nano super computer $249

https://www.youtube.com/watch?v=tkK7uVPb29s

https://blogs.nvidia.com/blog/jetson-generative-ai-supercomputer/

Assuming an LLM could query a proprietary database on such a device without any security concerns.


Spatial computing

 https://www.linkedin.com/pulse/why-early-adopter-companies-embracing-spatial-computing-cathy-hackl-gwkle/?

Laser weapons in Ukraine

All the cool shit we love and dreamed of - VR, robots, artificial intelligence, drones. And, don't forget about lasers!  Just like in Star Wars, care of the evil empire. How long until a death star shows up posing as a moon and blows a planet apart? Earth, for example.

I was following laser weapons 20 years ago, I can't believe I haven't thought to check in sooner.

https://www.telegraph.co.uk/world-news/2024/12/18/russia-ukraine-zelensky-putin-war-latest-news16/

Monday, December 9, 2024

Google quantum computer breakthrough

 https://www.nytimes.com/2024/12/09/technology/google-quantum-computing.html

"On Monday, Google unveiled a new

hashtagquantumcomputer that may end this back-and-forth race with traditional machines and that points to a future in which quantum computers could drive advances in areas like drug discovery and artificial intelligence.

Google said its quantum computer, based on a computer chip called hashtagWillow, needed less than five minutes to perform a mathematical calculation that one of the world’s most powerful supercomputers could not complete in 10 SEPTILLION years (A septillion is 1 followed by 24 zeroes...
1,000,000,000,000,000,000,000,000), a length of time that exceeds the age of the known universe...

“When quantum computing was originally envisioned, many people — including many leaders in the field — felt that it would never be a practical thing,” said mikhail lukin, a professor of physics at Harvard University and a co-founder of the quantum computing start-up QuEra Computing Inc. “What has happened over the last year shows that it is no longer science fiction.”...

Google’s quantum computer also uses a form of error correction — a way of reducing mistakes — that could allow this kind of machine to reach its potential. In a research paper published on Monday in the science journal Nature Magazine, Google said its machine had surpassed the “error correction threshold,” a milestone that scientists have been working toward for decades."