"Quantum Cheshire Cat" observed - A particle separated in space from one of its properties - Polidicks

[quote][B]Scientists have for the first time separated a particle from one of its physical properties - creating a "quantum Cheshire Cat".[/B] The phenomenon is named after the curious feline in Alice in Wonderland, who vanishes leaving only its grin. Researchers took a beam of neutrons and separated them from their magnetic moment, like passengers and their baggage at airport security. They describe their feat in Nature Communications. The same separation trick could in principle be performed with any property of any quantum object, say researchers from Vienna University of Technology.[/quote] Article: [url]http://www.bbc.com/news/science-environment-28543990[/url] Paper (theoretical basis): [url]http://arxiv.org/pdf/1202.0631v2.pdf[/url] Paper (experimental result): [url]http://www.nature.com/ncomms/2014/140729/ncomms5492/pdf/ncomms5492.pdf[/url] 10 megaChopras worth of crazy bullshit

[QUOTE][IMG]http://news.bbcimg.co.uk/media/images/76604000/jpg/_76604022_cheshire-cat-paths.jpg[/IMG] The cat (the neutron) goes via the upper beam path, while its grin (the magnetic moment) goes via the lower.[/QUOTE] Holy crap, the first time I've seen the BBC simplify something without stretching it to the point that it no longer applies. [QUOTE]Although here we have only presented one example in full detail, where a photon is disembodied from its polarisation, it should be clear that this effect is quite general - we can separate, for example, the spin from the charge of an electron, or internal energy of an atom from the atom itself. Furthermore it is important to realise that it is not just pointers of well-prepared measuring devices that indicate that the properties are disembodied - any external system which interacts weakly with the pre- and post-selected system will react accordingly - Paper[/QUOTE] That is awesome!

[QUOTE=Bradyns;45538999]Holy crap, the first time I've seen the BBC simplify something without stretching it to the point that it no longer applies.[/QUOTE] Lol that's because it was lifted straight out of the Nature Communications paper.

That's cool and all but can these scientists separate the pants from a female? #destroyed

Johnny do the physics machines that help discover these crazy things make cool, pulsating noise and have flashy lights or is my imagination of what Physicists use to come up with these things a lie? Because [quote]Researchers took a beam of neutrons and separated them from their magnetic moment, like passengers and their baggage at airport security.[/quote] Sounds like some Black Mesa shit.

i have no clue how this happens, could someone explain

so... what are the practical effects of this?

I don't know anything about reality anymore. How do you separate, even temporarily, a particle from its fundamental properties? Not the physical method, that's what the papers are about. That's like being able to separate someone and their skin colour for short periods. I'm having a lot of trouble conceptualizing this and what kind of underlying fundamental mechanisms must exist to allow this to happen. Every time I think I have a handle on the world, it becomes vastly weirder. I think Douglas Adams was right about discovering the purpose of the universe.

Separate mass from spaceships.

[QUOTE=DowntownTiger;45539318]so... what are the practical effects of this?[/QUOTE] for you to ask this question. no other reason, not at all.

[QUOTE=DowntownTiger;45539318]so... what are the practical effects of this?[/QUOTE] woah lookie who didn't read the article [quote]Their delicate apparatus could have useful applications in high-precision metrology, the researchers say. "For example, one could imagine a situation in which the magnetic moment of a particle overshadows another of the particle's properties which one wants to measure very precisely. "The Cheshire Cat effect might lead to a technology which allows one to separate the unwanted magnetic moment to a region where it causes no disturbance to the high-precision measurement of the other property."[/quote]

[QUOTE=JohnnyMo1;45538956]Researchers took a beam of neutrons and separated them from their magnetic moment, like passengers and their baggage at airport security.[/QUOTE] This doesn't sound very hard, it happens to me every god damn time I take a flight.

[QUOTE=Paramud;45539434]This doesn't sound very hard, it happens to me every god damn time I take a flight.[/QUOTE] You separate neutrons from their magnetic moment every time you take a flight? Props.

Neat, so by taking the magnetic moment and putting it to one side, we can better understand the properties of particles and thus further our understanding of Science! quark by quark, lepton by lepton, with a cumulative effect overall.

[QUOTE=Teddybeer;45539497]Everything went downhill after Pluto was no longer a planet, dinosaurs almost all had feathers, and they found water on the moon.[/QUOTE] What's next? Magic being real?

[QUOTE=SinjinOmega;45539615]What's next? Magic being real?[/QUOTE] [URL="http://en.wikipedia.org/wiki/Clarke's_three_laws"]Any sufficiently advanced technology is indistinguishable from magic.[/URL]

i still have nightmares about that cat

[QUOTE]Although here we have only presented one example in full detail, where a photon is disembodied from its polarisation, it should be clear that this effect is quite general - we can separate, for example, the spin from the charge of an electron, or[B] internal energy of an atom from the atom itself[/B]. Furthermore it is important to realise that it is not just pointers of well-prepared measuring devices that indicate that the properties are disembodied - any external system which interacts weakly with the pre- and post-selected system will react accordingly - Paper[/QUOTE] Fission with a selectable decay mode?

This sounds messed up. It's like saying 'we cut the green off a tree'

[IMG]http://i.imgur.com/zb3x60y.png[/IMG] Please, explain. I want to know, what are those weird closures > and < Also I literary have no idea, what really this means but I think it is good since there is possible deep manipulation of matter if we can disable properties...?

[QUOTE]Glimpsing this Cheshire Cat requires what quantum physicists call "weak measurement," whereby you interact with a system so gently that you avoid collapsing it from a quantum state to a classical one.[/QUOTE] Also, holy shit, does this mean we could bypass Heisenberg's principle? [editline]29th July 2014[/editline] [QUOTE=Fourier;45539858][IMG]http://i.imgur.com/zb3x60y.png[/IMG] Please, explain.[/QUOTE] State vectors of a particle(s), IIRC, the + and - are a declaration of magnetic moments. There's also up and down arrows which also represent spin states.

[QUOTE=LoneWolf_Recon;45539884]Also, holy shit, does this mean we could bypass Heisenberg's principle? [editline]29th July 2014[/editline] State vectors of a particle(s), IIRC, the + and - are a declaration of magnetic moments. There's also up and down arrows which also represent spin states.[/QUOTE] Seems like it...?

[QUOTE=LoneWolf_Recon;45539884]Also, holy shit, does this mean we could bypass Heisenberg's principle? [editline]29th July 2014[/editline] State vectors of a particle(s), IIRC, the + and - are a declaration of magnetic moments. There's also up and down arrows which also represent spin states.[/QUOTE] I doubt you can top his 97 percent purity if you are going into the Meth trade.

[QUOTE=Fourier;45539858][IMG]http://i.imgur.com/zb3x60y.png[/IMG] Please, explain. I want to know, what are those weird closures > and <[/QUOTE] As LoneWolf_Recon said, the |+> is a quantum state. <+| is the dual vector representation of the same state. Because of the way the states are set up, sigma_z is is an operator (having state vectors face each other in that |><| configuration allows them to act on other state vectors).

The fact that this happens is going to wreak hell on classifications. [editline]30th July 2014[/editline] I think

[QUOTE=OvB;45539237]Johnny do the physics machines that help discover these crazy things make cool, pulsating noise and have flashy lights or is my imagination of what Physicists use to come up with these things a lie? Because Sounds like some Black Mesa shit.[/QUOTE] black mesa can kiss my broke bankrupt ass, apperature science would have discovered this first and already made it into some form of gel

[QUOTE=LoneWolf_Recon;45539884]State vectors of a particle(s), IIRC, the + and - are a declaration of magnetic moments. There's also up and down arrows which also represent spin states.[/QUOTE][QUOTE=JohnnyMo1;45540083]As LoneWolf_Recon said, the |+> is a quantum state. <+| is the dual vector representation of the same state. Because of the way the states are set up, sigma_z is is an operator (having state vectors face each other in that |><| configuration allows them to act on other state vectors).[/QUOTE]This is like that time my friend dropped a tardload of acid and tried to explain to me why Sesame Street was proof for the existence of God. I knew he was trying to communicate [i]something[/i] to me but I had no idea what the [i]fuck[/i] he was talking about. I also had no way of figuring out how to find out what he was talking about, so I just listened patiently until he settled down. I have no fucking idea what any of this means, I get the nice pretty picture with the cat but all of this Oz = |heresy+><cannot be-| stuff is just so far away from things I understand.

[QUOTE=JohnnyMo1;45539422]woah lookie who didn't read the article[/QUOTE] doesnt sound very practical

[QUOTE=DowntownTiger;45540484]doesnt sound very practical[/QUOTE] the fact that I'm never going to use a tampon doesn't mean they aren't practical

[QUOTE=JohnnyMo1;45540492]the fact that I'm never going to use a tampon doesn't mean they aren't practical[/QUOTE] dude nosebleeds