Author Topic: unmeasurable particle created???  (Read 5884 times)

GrannySmith

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unmeasurable particle created???
« on: May 14, 2013, 07:03:15 am »
Well, the last years, science news are becoming more and more science fiction but THIS.........!

http://www.newscientist.com/article/mg21829160.300-nothing-to-see-the-man-who-made-a-majorana-particle.html
Quote
What is a Majorana fermion?
It is named for the physicist Ettore Majorana, who found that a particle could be its own antiparticle. If a particle has properties with values unequal to zero, then its antiparticle has the opposite values. What that means is that all the properties of a Majorana fermion, the charge, energy, what have you, it's all zero. It is a particle, but it doesn't have properties that we can measure. :eek: :eek: That makes it very mysterious. It also makes it difficult to find.

sometimes it seems that soon there might be nobody left who can understand science anymore... 
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LMNO

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Re: unmeasurable particle created???
« Reply #1 on: May 14, 2013, 03:29:42 pm »
Ah.  I see.  It's an unmeasurable particle, because they're using that incredibly specific definition of "particle", which when used this way, is almost like a verb. 

GrannySmith

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Re: unmeasurable particle created???
« Reply #2 on: May 14, 2013, 10:13:01 pm »
Ah.  I see.  It's an unmeasurable particle, because they're using that incredibly specific definition of "particle", which when used this way, is almost like a verb.

well i guess you don't make it to pop science magazines with explaining properly!  :)

I'm not so familiar with particle physics - is this another case of terminology getting out of hand?
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Nephew Twiddleton

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Re: unmeasurable particle created???
« Reply #3 on: May 14, 2013, 11:55:32 pm »
Ah.  I see.  It's an unmeasurable particle, because they're using that incredibly specific definition of "particle", which when used this way, is almost like a verb.

well i guess you don't make it to pop science magazines with explaining properly!  :)

I'm not so familiar with particle physics - is this another case of terminology getting out of hand?

I think its not so much that but the terminology being misleading to the layman.
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LMNO

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Re: unmeasurable particle created???
« Reply #4 on: May 15, 2013, 02:47:58 pm »
All subatomic terminology is misleading, because all words are related to the macro universe (which is inherently intuitive and based upon experience), and the subatomic universe is completely non-intuitive. 

The most accurate way to describe these things is through the math involved, which perhaps a dozen people fully understand.

Faust

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Re: unmeasurable particle created???
« Reply #5 on: May 15, 2013, 02:51:41 pm »
How exactly is this particle any different from a nothing, the absence of a particle?

LMNO

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Re: unmeasurable particle created???
« Reply #6 on: May 15, 2013, 02:55:26 pm »
From the article:

Quote
The Majorana comes out of the superposition of an electron and a "hole" – the absence of an electron in a metal. By applying a magnetic field to semiconducting nanowires laid across a superconductor, you can move electrons along these wires, creating two points in space that each mimic half an electron. The electrons go back and forth, so the hole jumps from left to right. If it spends an equal amount of time on each side, then, quantum mechanically, it's in a superposition of being on the left and right. If it's stable, then we call it a particle.

So it's more of an event or probability function, but they call it a particle.

GrannySmith

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Re: unmeasurable particle created???
« Reply #7 on: May 15, 2013, 04:05:07 pm »
The most accurate way to describe these things is through the math involved, which perhaps a dozen people fully understand.
:) :) now i want to see that math!! :) :)
any suggestions where to start?
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LMNO

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“I’m guessing it was January 2007, a meeting in Bethesda, we got a bag of bees and just started smashing them on the desk,” Charles Wick said. “It was very complicated.”


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Re: unmeasurable particle created???
« Reply #10 on: May 15, 2013, 04:44:20 pm »
I literally could only do it by reading one or two pages a day.

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Re: unmeasurable particle created???
« Reply #11 on: May 15, 2013, 04:57:06 pm »
I literally could only do it by reading one or two pages a day.

Wow.  :eek:
“I’m guessing it was January 2007, a meeting in Bethesda, we got a bag of bees and just started smashing them on the desk,” Charles Wick said. “It was very complicated.”


Nephew Twiddleton

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Re: unmeasurable particle created???
« Reply #12 on: May 15, 2013, 04:58:39 pm »
Yeah, I had to put it aside completely until the finals are over.
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Re: unmeasurable particle created???
« Reply #13 on: May 15, 2013, 04:58:43 pm »
It was meant to be sort of a textbook.  So it really cuts out the filler.

Nephew Twiddleton

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Re: unmeasurable particle created???
« Reply #14 on: May 15, 2013, 05:06:30 pm »
Even still, cutting out the filler is a good thing. Like you said, macro analogies only make it more confusing. There were a few things in there where when I read his explanation, I was like, "oh. Actually that makes sense." Sense here meaning, the description makes sense.
Steely-Eyed Replicant Frottage Master of Yesterday's Lost Glory
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