Interesting Physics

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Message 1719616 - Posted: 28 Aug 2015, 14:15:18 UTC

I found another interesting article on my smart phone that I thought was worth sharing. This new phone has been the source of a remarkable amount of information. This thread can be for anything interesting in physics that may not warrant a separate thread.

http://www.nature.com/news/quantum-spookiness-passes-toughest-test-yet-1.18255

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Message 1719637 - Posted: 28 Aug 2015, 15:19:09 UTC

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Message 1720291 - Posted: 30 Aug 2015, 14:56:16 UTC
Last modified: 30 Aug 2015, 14:59:38 UTC

The MAX-IV laboratory will host the first two 'fourth-generation' light sources.
Electrons have begun circulating in a synchrotron in Lund, Sweden, in what researchers hope marks the start of a new era for X-ray science.
http://www.nature.com/news/next-generation-x-ray-source-fires-up-1.18253

Our universe.
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Message 1720292 - Posted: 30 Aug 2015, 14:56:32 UTC

For those with access to the BBC's iPlayer, there is a series presented by Jim Al-Khalili dealing with the spooky entanglement available at the moment.

The Secrets of Quantum Physics, Let there be Life

Physicist Jim Al-Khalili routinely deals with the strangest subject in all of science - quantum physics, the astonishing and perplexing theory of sub-atomic particles. But now he's turning his attention to the world of nature. Can quantum mechanics explain the greatest mysteries in biology?
His first encounter is with the robin. This familiar little bird turns out to navigate using one of the most bizarre effects in physics - quantum entanglement, a process which seems to defy common sense. Even Albert Einstein himself could not believe it.
Jim finds that even the most personal of human experiences - our sense of smell - is touched by ethereal quantum vibrations. According to the latest experiments, it seems that our quantum noses are listening to smells. Jim then discovers that the most famous law of quantum physics - the uncertainty principle - is obeyed by plants and trees as they capture sunlight during the vital process of photosynthesis.
Finally, Jim asks if quantum physics might play a role in evolution. Could the strange laws of the sub-atomic world, which allow objects to tunnel through impassable barriers in defiance of common sense, effect the mechanism by which living species evolve?
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Message 1720294 - Posted: 30 Aug 2015, 15:11:14 UTC - in response to Message 1720292.  
Last modified: 30 Aug 2015, 15:28:22 UTC

For those with access to the BBC's iPlayer, there is a series presented by Jim Al-Khalili dealing with the spooky entanglement available at the moment.

The Secrets of Quantum Physics, Let there be Life

And let there be light.


Hopefully Jim Al-Khalili will let Swedish Television show that documentry.
Many of his other series has been broadcasted here.
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Message 1720301 - Posted: 30 Aug 2015, 15:22:34 UTC - in response to Message 1720291.  
Last modified: 30 Aug 2015, 15:29:57 UTC

I was at Trieste Area Science Park while the Elettra Synchrotron Radiation Source was being built. This in the Nineties. Once a Slovak woman who was a physicist working on the Elettra came to my office and asked me for advice. Some mechanical parts which were parts of the magnets focussing the beams had been built with an error of one millimeter from the blueprints by an Italian firm which I will not name. She told me that if they sent back the parts it would impose a delay of about six months on the building schedule. Do you think we should install them and pray? she asked me. I said yes. Since Elettra started working on schedule and has now been coupled to a free electron laser, I think my judgment was right. But I received no recognition.
Tullio.
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Message 1720308 - Posted: 30 Aug 2015, 15:40:05 UTC - in response to Message 1720301.  

About building schedule, Tullio.
They at MAX IV will build eight experimental stations, or beamlines, around the synchrotron, which they plan to open on 21 June 2016, a date chosen for the symbolism of the summer solstice.
I hope our mechanical parts are right.
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Message 1720312 - Posted: 30 Aug 2015, 16:04:04 UTC - in response to Message 1720308.  
Last modified: 30 Aug 2015, 16:05:03 UTC

Elettra has 12 beamlines. One of them was devoted to scanning for mammary cancer. Elettra is used also by scientists from Eastern Europe since is nearer to them than Grenoble or Hamburg.I believe your mechanical parts will be perfect. Italian firms are rather sloppy sometimes.
Tullio
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Message 1720902 - Posted: 1 Sep 2015, 11:51:24 UTC

With only 8 posts and 3 from the usual spammer, I decline to join in.
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Message 1720913 - Posted: 1 Sep 2015, 12:39:18 UTC - in response to Message 1720902.  

With only 8 posts and 3 from the usual spammer, I decline to join in.

So not very intelligent then to state the above. Usual post count boost is it?
Unless you have something constructive to say on a science thread, stop spamming it with your usual twaddle.
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Message 1720918 - Posted: 1 Sep 2015, 12:58:41 UTC

Very Interesting Science man . soon as they can get phones to do it I'm in the shop to get one .

And the N.S.A , C.I.A , F.B.I , A.F.P , K.G.B, blah blah balh

Can't spy on me

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Message 1720919 - Posted: 1 Sep 2015, 13:01:39 UTC - in response to Message 1720292.  

For those with access to the BBC's iPlayer, there is a series presented by Jim Al-Khalili dealing with the spooky entanglement available at the moment.
The Secrets of Quantum Physics, Let there be Life

For non british here is Jim Al-Khalili.
Evening Discourse at the Royal Institution, Professor Jim Al-Khalili explores how the mysteries of quantum theory might be observable at the biological level
Jim Al-Khalili - Quantum Life: How Physics Can Revolutionise Biology
https://www.youtube.com/watch?v=wwgQVZju1ZM

Jack Tuszynski Biology on the Threshold of Quantum Revolution
https://www.youtube.com/watch?v=Gxqxb3xnntQ
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Message 1721076 - Posted: 2 Sep 2015, 1:33:45 UTC

Watched them both. Not much new, after reading Schroedinger's "What is life?" and Penrose's "The emperor's new mind" and "Shadows of the mind". I had an exchange of letters with Penrose on this subject in 1995. That is twenty years ago.
Tullio
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Message 1721228 - Posted: 2 Sep 2015, 10:16:22 UTC - in response to Message 1721076.  
Last modified: 2 Sep 2015, 10:17:09 UTC

Watched them both. Not much new, after reading Schroedinger's "What is life?" and Penrose's "The emperor's new mind" and "Shadows of the mind". I had an exchange of letters with Penrose on this subject in 1995. That is twenty years ago.
Tullio

To us commoners it's very new Tullio:)
It was "only" 70 years ago Schrödinger when he come up with the idea that genes contained some kind of "code". We now call it DNA.
http://www.theguardian.com/science/blog/2013/feb/07/wonders-life-physicist-revolution-biology
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Message 1721233 - Posted: 2 Sep 2015, 11:04:42 UTC - in response to Message 1721228.  
Last modified: 2 Sep 2015, 11:06:16 UTC

The only new thing I learned is that a DNA mutation can derive from a quantum tunneling effect in a Hydrogen bond. I also learned that European robin birds rely on entanglement in a crystal in their beaks to navigate in the Earth's magnetic field. Bravi robin!
Tullio
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Message 1721634 - Posted: 3 Sep 2015, 9:55:48 UTC

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Message 1721671 - Posted: 3 Sep 2015, 12:56:05 UTC
Last modified: 3 Sep 2015, 12:57:18 UTC

What a load of rubbish!!!!!!!

None of this helps in the long run. Suppose the universe is somehow entirely predetermined, the flutter of every photon carved in stone since time immemorial. In that case, no one would ever have a choice about anything. “The freedom of choice loophole will never be closed fully,” says Kofler. As such, it’s not really worth experimentalists worrying about – if the universe is predetermined, the complete lack of free will means we’ve got bigger fish to fry.

For the layman, we simply don't know, we think we might know, we may never know. We are hedging out bets, and having a bad hair day.

So what would Einstein have made of this new result? Unfortunately he died before Bell proposed his inequality, so we don’t know if subsequent developments would have changed his mind, but he’d likely be enamoured with the lengths people have gone to prove him wrong. “I would give a lot to know what his reaction would be,” says Zeilinger. “I think he would be very impressed.”

I think Einstein would sit down with a clean sheet of paper and start again.

I am disappointed with the New Scientist, a publication I have respected for many years. Probably trying to compete with the Huff in a difficult world.
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Message 1721673 - Posted: 3 Sep 2015, 12:58:30 UTC - in response to Message 1721634.  

Frankly I don't understand. The two electrons in A and B are not entangled. If each of them sends out a photon with which it is entangled and if the photons arrive at the same instant in C then the electrons in A and B become entangled. This is what I get from the New Scientist article, but maybe the article is not clear enough and I should read the full article.
Tullio
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Message 1721676 - Posted: 3 Sep 2015, 13:08:07 UTC - in response to Message 1721671.  

What a load of rubbish!!!!!!!

None of this helps in the long run. Suppose the universe is somehow entirely predetermined, the flutter of every photon carved in stone since time immemorial. In that case, no one would ever have a choice about anything. “The freedom of choice loophole will never be closed fully,” says Kofler. As such, it’s not really worth experimentalists worrying about – if the universe is predetermined, the complete lack of free will means we’ve got bigger fish to fry.

For the layman, we simply don't know, we think we might know, we may never know. We are hedging out bets, and having a bad hair day.

I agree with u...even if experiment is OK & proves that some things r predetermined 2 happen...that doesn't mean I don't have a choice how 2 respond 2 it!

if a war happens, u have choices: 2 fight, 2 hide & 2 run...
if a comet strikes, u have choices: 2 make love, 2 run 4 ur life, 2 escape 2 Moon & back, 2 hide underground, 2 hide under d sea...

d experiment only says:
"Whatever happens, will happen. But if u don't have choices & free will, like electrons don't, then u'll change also!"
;)

non-profit org. Play4Life in Zagreb, Croatia, EU
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Message 1721679 - Posted: 3 Sep 2015, 13:20:19 UTC - in response to Message 1721673.  
Last modified: 3 Sep 2015, 13:37:44 UTC

Frankly I don't understand. The two electrons in A and B are not entangled. If each of them sends out a photon with which it is entangled and if the photons arrive at the same instant in C then the electrons in A and B become entangled. This is what I get from the New Scientist article, but maybe the article is not clear enough and I should read the full article.
Tullio

Some more on loopholes.
https://en.wikipedia.org/wiki/Loopholes_in_Bell_test_experiments
http://arxiv.org/abs/1508.05949
http://michelvanbaal.weblog.tudelft.nl/2014/04/22/the-loophole-free-what/?TUD-USE-COOKIES=yes
http://michelvanbaal.weblog.tudelft.nl/2015/02/02/the-loophole-free-what-part-2/

Welcome to the Hanson lab at Delft University of Technology!
http://hansonlab.tudelft.nl/
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