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Author Topic:   Article About New Developments in Quantum Mechanics
Percy
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Posts: 19418
From: New Hampshire
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Message 1 of 18 (784895)
05-25-2016 9:33 AM


New evidence could break the standard view of quantum mechanics says a headline at Science Alert. Before proposing a discussion topic I thought I'd ask if anyone knows if there's really something meaningful going on, or is this just a rehash of a fringe scientific possibility sparked by a recent paper?

--Percy


Replies to this message:
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Modulous
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Posts: 7789
From: Manchester, UK
Joined: 05-01-2005


Message 2 of 18 (784899)
05-25-2016 12:06 PM
Reply to: Message 1 by Percy
05-25-2016 9:33 AM


But now a group of researchers led by Aephraim Steinberg from the University of Toronto in Canada have conducted this experiment IRL, showing that it does make sense with Bohmian mechanics, as long as people remember to consider nonlocality - that idea that particles can affect other particles anywhere in the Universe.

IRL huh? That's science journalism.

From my understanding this doesn't really actually change anything, it just makes one interpretation a little less peculiar compared with what we've already seen by experiment - if that makes sense.


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NoNukes
Inactive Member


Message 3 of 18 (784901)
05-25-2016 12:22 PM
Reply to: Message 1 by Percy
05-25-2016 9:33 AM


or is this just a rehash of a fringe scientific possibility sparked by a recent paper?

I agree with Modulus. It seems like a rehash, but perhaps the word 'fringe' is inappropriate. It is well known that there are interpretations of QM that require non-locality, and we've discussed that in these fora. The problem is that there are really good reasons to be suspicious of non-locality.

I suspect that there is some real science going on somewhere, but that what is reported here is the catchy part.

Edited by NoNukes, : No reason given.


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LamarkNewAge
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Message 4 of 18 (784907)
05-25-2016 4:10 PM


Roger Penrose and his book out yet?
Fashion, Faith, and Fantasy.

Fashion is the String Theory. It is fashionable but he prefers Twister theory.

Faith is the standard view of Quantum Mechanics because it is based on faith. It only works when the universe is real small and dense, and matter can't move around. (particles can pulse and fluctuate) But problems start when you try to move matter around, especially massive matter. He says it falls apart. (My guess is that particles move from universe to universe when the universe is densely packed, but the larger things get causes an entire universe to duplicate and not just individual particles. An "Alternate Universe" is something I have always understood as a duplicate universe. A "Multiple Universe" is another universe but an "original universe" as oppose to an Alternate Universe. All Alternate Universes are part of a "multiple universe" (?) but not all multiple universes are alternate universes. That's been my view since 1991-1992 anyway)

The Fantasy part is what he calls the early hyper Inflation view of the (period just after) Big Bang. He rejects the early hyper Inflation (in the first second of the Universe) and the multi-verse that results as part of it. He believes in one universe turning into another on and on and on , but seems to reject a multi-verse existing at the same "time". One is destroyed and then chronologically becomes a new one.

His book will broadly have 3 big topics where he takes a minority view on all.

I look forward to it.

Hope it finally comes out.


  
Percy
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From: New Hampshire
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Message 5 of 18 (784937)
05-26-2016 9:19 AM


Thanks for the responses.

--Percy


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LamarkNewAge
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Message 6 of 18 (785084)
05-27-2016 3:55 PM


The book is out lol.
https://www.google.com/?gws_rd=ssl#q=roger+penrose+fashio...

I need to start checking these things before posting.

I honestly thought he had given up on the book as he has ben talking about this one for ages.

He is so interesting. In 1989 he said that visitors from another galaxy would get here and see us doing things before we actually did things. Um, really. Back To The Future (movie), Quantum Leap (t.v. series), and Roger Penrose were the holy trinity of thought provokingness.

Hope it encourages discussion and the contrasting views in the debate can help clear the picture enough so that average people, like me, can begin to understand a little.


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Son Goku
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Posts: 1153
From: Ireland
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(2)
Message 7 of 18 (785402)
06-04-2016 8:03 AM
Reply to: Message 1 by Percy
05-25-2016 9:33 AM


Bohmian
Sorry Im a bit late on this.

In truth the Bohmian version and the standard version of Quantum Mechanics can be mathematically shown to give the same experimental results, so no experiment really shows that one is more consistent.

However the "bizarre" trajectories that the Bohmian model requires in some cases, had never been directly observed.

Now they have. However the standard view predicts the same results, it just doesn't attribute them to trajectories.

There is an interesting discussion to be had here, I think it really gets to the heart of the interpretational issues and the subject of weak measurements. However I'm not sure how to phrase it as a debate topic, "Can any experiment distinguish Quantum interpretations" perhaps?

Edited by Son Goku, : No reason given.


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Son Goku
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Posts: 1153
From: Ireland
Joined: 07-16-2005


Message 8 of 18 (785410)
06-04-2016 10:10 AM
Reply to: Message 6 by LamarkNewAge
05-27-2016 3:55 PM


Re: The book is out lol.
I don't think anything in Penrose's book relates to this topic though.

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RAZD
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Message 9 of 18 (870575)
01-22-2020 12:20 PM


quantum mechanics and superconductivity
Strange quantum effect found in an exotic superconductor

quote:
An international team of researchers observed an unexpected quantum effect in an exotic superconductor. Their discovery can lead to the next generation of energy-saving technologies.

Traditional superconductors, used for conducting electricity without resistance, work at low temperatures. However, some iron-based superconductors discovered about a decade ago, work at high temperatures. How they do it has been unclear, especially as the magnetism of iron conflicts with the appearance of superconductivity, explains the press release from Princeton, whose scientists led the research.

What was surprising, the researchers found that the cobalt atoms were able to disrupt electron pairing while replacing iron atoms in the metal. This behavior, which resulted in a quantum phase transition, changing the state from superconducting to non-superconducting, also violated the well-established Anderson's theorem. Proposed in 1959 by the Nobel Prize-winning physicist Philip Anderson, it was the accepted explanation for what would happen if you added impurities to a superconductor. The new research clearly shows an exception to Anderson's theorem.

Another unusual find revealed that the cobalt impurities also transformed the nature and the shape of the so-called "energy gap" - a feature emblematic of superconductivity. The shape of the gap is indicative of the "order parameter" linked to the nature of the superconductivity. The effect on this property is mysterious and points to a sign change in the order parameter's phase.


Page loads terribly slow.

Any comments?

Enjoy


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jar
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From: Texas!!
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Message 10 of 18 (870576)
01-22-2020 12:34 PM
Reply to: Message 9 by RAZD
01-22-2020 12:20 PM


Re: quantum mechanics and superconductivity
The page loading was disrupted showing a change of state from readable to non-readable.

My Sister's Website: Rose Hill Studios     My Website: My Website

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RAZD
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Message 11 of 18 (870580)
01-22-2020 12:56 PM
Reply to: Message 10 by jar
01-22-2020 12:34 PM


Re: quantum mechanics and superconductivity
And I couldn't find a link to the original paper


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Phat
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From: Denver,Colorado USA
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(1)
Message 12 of 18 (870623)
01-22-2020 5:12 PM
Reply to: Message 5 by Percy
05-26-2016 9:19 AM


Putting my PNT Here: A Quantum Leap
I just saw this topic and will withdraw my PNT and put it here.
I was reading Discover Magazine a few days ago and found a reference to Google Quantum Computer Studies. Probing further, I found the same information repeated here.
This was the basic fact presented:
quote:
Our Sycamore processor takes about 200 seconds to sample one instance of a quantum circuit a million times—our benchmarks currently indicate that the equivalent task for a state-of-the-art classical supercomputer would take approximately 10,000 years. This dramatic increase in speed compared to all known classical algorithms is an experimental realization of quantum supremacy8–14 for this specific computational task, heralding a much-anticipated computing paradigm.
Though the quantum computers are currently unstable enough for long term reliability, the glitches are being ironed out. Does anyone here know any more about this technology?

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PaulK
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(1)
Message 13 of 18 (870646)
01-23-2020 12:27 PM
Reply to: Message 12 by Phat
01-22-2020 5:12 PM


Re: Putting my PNT Here: A Quantum Leap
I know some. There are arguments over just how good Google’s results really are.

The BIG problem is scaling them up. The number of qubits (quantum bits) in a computer is still too low for big problems. The 53 in the Google experiment is high.

But it is good that there are problems. We aren’t ready for the security implications. A lot of widely-used cryptography is vulnerable to these machines - when they get big enough. Work is going on to replace them but it’s taking time - not least because the replacements need to be shown to be secure against normal attacks.


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RAZD
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Posts: 20548
From: the other end of the sidewalk
Joined: 03-14-2004
Member Rating: 2.9


(1)
Message 14 of 18 (870652)
01-23-2020 12:59 PM
Reply to: Message 13 by PaulK
01-23-2020 12:27 PM


Search Engine Problems
... There are arguments over just how good Google’s results really are.

Particularly when the results are biased by filtering preferences (for google ads for example) AND when they run on with a bunch of garbage listings with little relationship to the query string.

The big problem imho is absence of any filtering based on accurate, verifiable, valid content. Any idiot can (and does) post garbage and it gets the same treatment as good information. The more ignorant people get access to the internet, the more ignorant garbage gets posted, and the more anyone's search gets cluttered with it.

Enjoy


we are limited in our ability to understand
by our ability to understand
Rebel•American•Zen•Deist
... to learn ... to think ... to live ... to laugh ...
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Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)

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PaulK
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Posts: 15923
Joined: 01-10-2003
Member Rating: 2.3


Message 15 of 18 (870655)
01-23-2020 1:07 PM
Reply to: Message 14 by RAZD
01-23-2020 12:59 PM


Re: Search Engine Problems are not the topic
Google’s results in quantum computing are being questioned, notably by IBM

Eg science News (found using DuckDuckGo - my Search Engine of choice)


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