Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
×

Submission + - Peter Higgs, physicist, dead. (theguardian.com)

jd writes: Peter Higgs, the Nobel prize-winning physicist who discovered a new particle known as the Higgs boson, has died.

Higgs, 94, who was awarded the Nobel prize for physics in 2013 for his work in 1964 showing how the boson helped bind the universe together by giving particles their mass, died at home in Edinburgh on Monday.

After a series of experiments, which began in earnest in 2008, his theory was proven by physicists working at the Large Hadron Collider at Cern in Switzerland in 2012; the Nobel prize was shared with François Englert, a Belgian theoretical physicist whose work in 1964 also contributed directly to the discovery.

A member of the Royal Society and a Companion of Honour, Higgs spent the bulk of his professional life at Edinburgh University, which set up the Higgs centre for theoretical physics in his honour in 2012.

Prof Peter Mathieson, the university’s principal, said: “Peter Higgs was a remarkable individual – a truly gifted scientist whose vision and imagination have enriched our knowledge of the world that surrounds us.

“His pioneering work has motivated thousands of scientists, and his legacy will continue to inspire many more for generations to come.”

Comment Re:amazing (Score 4, Informative) 58

This is also vanilla RAM. Well, rad-hardened to the best of their ability back then, but as far as I can tell, there's oy error-correction in transmissions, not in the RAM itself.

https://destevez.net/2021/12/v...

Error-correcting RAM is used in business on Earth because cosmic rays can corrupt data over the brief lifespans of a business server. Imagine being in deep space with no atmosphere, no magnetosphere, and no heliosphere. The radiation the Voyagers are having to endure is orders of magnitude greater than designed for and for decades longer.

That a chip has fried is news because it's just one. NASA does amazingly well, but I doubt New Horizons will last as long, and I sincerely doubt any private firm will be capable of building a probe that can Voyager's achievements.

Comment Re:Bunch of useless bullshit. (Score 1) 185

Strangely, that's not actually true. Our brains did indeed evolve to work with maths, and indeed many animals (including insects) work with maths in identical ways. When independent cultures discovered maths, they discovered the same maths. They used different number bases and different symbols, but the formulations are identical.

Archimedes' formulations for statistics are virtually identical to Pascal's, and Archimedes' formulations for calculus work the same way as Leibnuz' and Newton's. Three independent forms of calculus that are basically identical, and two independent formulations of statistics that are also basically identical.

If everything from bees to crows to humans have identical maths, and all humans of all cultures have identical maths, then it gets seriously problematic to call it an invention.

If you cannot build a universe in which Pi or e take different values, then those values are not artifacts.

The only thing humans have done is chosen which axioms apply to a given system. Everything else is a consequence of the axioms chosen. Neither the steps to derive consequences nor the consequences themselves are manufactured.

Comment Re:Bunch of useless bullshit. (Score 1) 185

Space, time, matter, and possibly energy as well are thought to be emergent phenomena ultimately resulting from field interactions (with space and time emerging from particle interactions and particles resulting from field interactions).

If Prof Tegmark is correct, fields themselves emerge from maths. If string theorists are correct, fields emerge from brane interactions.

No matter who us right (if anyone), concepts like "physical" take a beating. If space and time are the result of interactions between interactions between fields, then all if our equations are upside-down. Nothing occurs in space over time, space and time occur in interactions, which then presumably must vary over some other quality.

We've also got a problem with objective reality. Quantum calculations work between measurements, but definitely don't work if you try to calculate intermediate states. You almost have to assume there aren't any, that reality only exists when it's observed.

If concepts like "reality" and "physical" don't refer to anything that is useful, if assuming them produces calculations that are always wrong, then they might not be useful concepts. Quantum Mechanics seems to describe what the universe does, but not why it does it or how it does it. The numbers "just work". That's indeed the basis behind the standard interpretation.

But if that is the case, and if seems to be, then it seems reasonable for theoreticians to try and produce models that say why that's the case. However, I've no issue with it being left to theoreticians, which Elon Musk et al certainly aren't.

Comment Re:That's ONE possibility (Score 1) 185

If Professor Penrose is correct about the nature of consciousness, then Many Worlds cannot be correct.

If quantum uncertainty in position applies to spacetime and not just space, then Many Worlds would require that particles can experience interactions that don't actually occur in the timeline of the observer.

Many Worlds is mandatory if (a) information must be conserved, (b) superposition is information and not just potential information, and (c) the universe along any given path is an open system. But if it is an open system, with the sum of all paths being a closed system, we must consider the other conservation laws from that standpoint.

So there might be possible openings.

Comment Re:Someone has never studied philosophy... (Score 1) 185

It would indeed be falsifiable. Remember, QM predicts that the universe is filled with quantum foam on the order of Planck scale, and also predicts that interactions can operate over any distance (although information itself cannot move faster than light).

This is, essentially, not computable on any architecture whatsoever. You'd have to have simplifications. And that means GR and QM cannot be unified if we live in a simulation. GR would be a deliberate simplification to avoid having to do an impossible number of calculations. It would be roughly right, but measurably different.

You also have to have quantised spacetime, as no technology (however advanced) can describe infinite precision.

Simulation can be event-based or time-based. Since there seem to be valid reasons for thinking objective reality is a very dodgy concept between quantum observations - we can calculate outcomes but not paths to get there, the numbers don't work if you try to do intermediate calculations - then I would contend physics as we understand it could only be done via an event-driven model. But if this is true, then it would be necessary that this be true for ALL of physics at this level. The simulation would need to be consistent for everything modelled, but physics has no such constraint.

Time is thought to emerge from particle interactions, and particles are thought to emerge from field interactions. By implication, fields can't be constrained by any restriction on time. If fields are event-driven, then I might get interested.

Slashdot Top Deals

He has not acquired a fortune; the fortune has acquired him. -- Bion

Working...