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Quantum Entanglement

Discussion in 'Science & Technology' started by Drone, Dec 5, 2011.

  1. Drone

    Drone

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    This is so kewl. Here's why:

    For those who forgot or don't know what quantum entanglement is:

    But ...

    But not this time. They managed to achieve this in macroscopic objects at room temperature! They used two squares of synthetically produced diamond, each 3mm across and a laser pulse, bisected by a beam splitter, passing through the diamonds and a photon detector. A phonon which was generated in the process helped them to realize that entanglement did actually happen. Even though the process didn't last long (only few picoseconds) they ran experiment over and over again to gather statistically significant results which made them conclude with confidence that entanglement had indeed been achieved.

    To verify the process they did this:

    Oxford and NUS physicist Vlatko Vedral, who was not involved in the new research, says:

    So here we have it, quantum laws in everyday life. I found this article @ Scientific American :)

    http://www.scientificamerican.com/article.cfm?id=room-temperature-entanglement



    Other interesting articles from SA:

    http://www.scientificamerican.com/article.cfm?id=high-noon-entanglement
    http://www.scientificamerican.com/article.cfm?id=living-in-a-quantum-world
     
    Last edited: Feb 19, 2014
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  2. theJesus

    theJesus

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  3. Drone

    Drone

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    ^ So what? Anywho .. :confused:


    Now entanglement can be generated, manipulated and measured. This time it's not diamonds, it's a chip. So programmable quantum processors will be real someday.

    [​IMG]

    The pic above:

    Nice news. They've been working on this for the past six years. Developing quantum photonic chips ain't an easy task I suppose.

    Yay!

    http://www.physorg.com/news/2011-12-multi-purpose-photonic-chip-paves-programmable.html
     
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  4. W1zzard

    W1zzard Administrator Staff Member

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    an easier explanation in (my opinion) is:

    - you have two magic boxes, each with a black or white ball inside.
    - the magic boxes are linked.
    - when you open one and get a black ball, the other is guaranteed to have a white ball. and vice versa

    either way. it can't be used for ftl information transfer
     
    Last edited: Dec 12, 2011
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  5. Drone

    Drone

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    Yup that too. So quantum computers can have logical NOT operator (negation) "for free" without spending a single cycle on it which is awesome. Because of this the orthogonalization / normalization of matrices and any other calculations can be performed much faster. I bet with quantum computers programmers would need totally different kind of logic because this kind of computing would require a different approach :eek:
     
  6. 3volvedcombat

    3volvedcombat New Member

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    Someone Should Seriously Be a Professor. A teacher, Something ^^^^^^:toast::toast:
     
  7. Drone

    Drone

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    [​IMG]

    More news about entangled diamonds:

    Diamonds are entangled with one vibration shared between them! This vibration in diamond can be detected using a laser. Researchers sent bursts of laser through both diamonds:

    ‘In fact, the universe doesn't know which diamond is vibrating!’ one of the researchers explains. They think about practical application for this work in the future such as encryption:

    http://www.physorg.com/news/2011-12-vibration-entangled-diamonds.html
     
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  8. qubit

    qubit Overclocked quantum bit

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    You might want to read this together with the news article that I posted a couple of weeks ago. :) Drone, you've obviously put a lot of effort into your posts here to give us something of quality to read and I think that's really cool. :cool:

    Power to the qubit! :rockout: :laugh:

    Mods, I request that you do not close or merge this thread, as I think the two complement each other. :toast:
     
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  9. Drone

    Drone

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    Yes I don't want to get this topic put in news because all the threads in the News forums will get buried pretty soon. While in Science & Technology it's easiser to navigate and "pile up" all interesting ideas and findings.
     
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  10. The_Ish

    The_Ish New Member

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    So how is it guaranteed to have the opposite color if it's EITHER a black or white?
     
  11. Drone

    Drone

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    Totally unrelated but I want to post this amazing video made by JAPAN INSTITUTE OF SCIENCE AND TECHNOLOGY here because it's awesome



    It's called Quantum levitation. It's awesome what magnetic field, electric current and Lorentz force can do! They use liquid nitrogen for cooling.

    If only superconductivity wouldn't need that brutal cooling this technology could be used for real transportation! Maybe somewhen somewhere ...
     
    Last edited by a moderator: Nov 20, 2013
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  12. qubit

    qubit Overclocked quantum bit

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    Wow, that really was awesome. :) You could see the precise control they had over the cars too, round every bend and hump.
     
    Last edited by a moderator: Nov 20, 2013
  13. Drone

    Drone

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    Seeing quantum mechanics with the naked eye

    Can anyone rename my thread to Quantum Mechanics & Co. ? Because I want to post other news here without creating a new thread. Thanks.

    Ok. By the grace of God Almighty and the pressures of the marketplace ... nevermind.

    http://www.physorg.com/news/2012-01-quantum-mechanics-naked-eye.html

    They used some tricks:

    Polaritons are awesome because they entangle themselves quantum mechanically. :cool: Yes as always laser was involved ;)

    Mind blowing.

    Why did they do this? Because this is important for science and technology.

     
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  14. Drone

    Drone

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    Another interesting article which tells how physicists cool semiconductor by laser

    Very interesting because cooling was achieved by warming LOL!

    As always researchers combined two worlds – quantum physics and nano physics. Lasers, entanglement, electrons, near zero temperatures ... you'll find it all there.

    http://www.physorg.com/news/2012-01-physicists-cool-semiconductor-laser.html

    They managed to produce a nanomembrane that is only 160 nm thick and with an area of more than 1 mm2!

    You ask why this is so cool? Because this discovery reconciles quantum mechanics with macroscopic materials to explore the Optomechanics (the interaction between light and a mechanical motion). The potential of optomechanics could pave the way for cooling components in quantum computers. So you no longer would need liquid helium, just lasers ;) Laser cooling FTW!

    And now pics:

    [​IMG]

    Vacuum chamber

    [​IMG]

    Koji Usami shows nanomembrane.

    [​IMG]

    Laser controlled with a forest of mirrors hits the nanomembrane.
     
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  15. Drone

    Drone

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    Now scientists want to observe 'Quantum Criticality' but they didn't get ultracold temperatures yet:

    Lasers and vacuum chamber is the best cooling system.

    That's interesting and cool

    Not cold enough tho

    I wish them luck. Because this is one of the most important things.

    http://www.physorg.com/news/2012-03-quantum-criticality-ultracold.html
     
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  16. slyfox2151

    slyfox2151

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    can you Quantum Entangle 3 objects? or more?
     
  17. Damn_Smooth

    Damn_Smooth New Member

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    I can't.
     
  18. AphexDreamer

    AphexDreamer

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    I'm sorry but all I can think and hope for is for a Portal Gun.
     
  19. twilyth Guest

  20. Drone

    Drone

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    solid-state quantum computer inside a diamond

    Yeah decoherence is really annoying. But the good news is the quantum computing becomes more stable and reliable. They added some impurities to that diamond:

    As always we have a dilemma. Faster = less reliable, slower = more stable. They needed to babysit this process to protect it from nasty decoherence.

    They tested this on Grover's algorithm (a problem when you need to search for a name in a phone book when you've only been given the phone number) and it kinda worked.

    http://www.physorg.com/news/2012-04-quantum-built-diamond.html


    other info:

    http://phys.org/news/2012-04-entanglement-quantum-bits-semiconductor.html
    http://phys.org/news/2011-05-genuine-multiparticle-entanglement.html

    more:

    http://phys.org/news/2012-04-evidence-majorana-fermions.html
    http://phys.org/news/2011-10-exotic-quantum-states-approach.html
    http://phys.org/news/2011-04-quantum-bits-physicists-limits.html
     
    Last edited: Apr 13, 2012
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  21. Drone

    Drone

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    Teh qwantum interwebz is one step closer, weeeeee!

    That's cool. Scientists have successfully transmitted quantum states between the two Canary Islands.

    It's a new kind of protocol for the transmission of information between quantum computers. Conventional data is sent alongside the quantum information, enabling the recipient to decipher the transferred signal with a higher efficiency. Their next goal is satellite-based quantum teleportation, which should enable quantum communication on a global scale. Well done, thumbs up!

    http://phys.org/news/2012-09-km-physicists-quantum-teleportation-distance.html
     
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  22. Velvet Wafer

    Velvet Wafer New Member

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    all of that happening within not even a year... i guess there is something big coming in the next 10 years :D
     
  23. Drone

    Drone

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    [​IMG]

    That's great. It means that technology can be built on silicon chips based on single atoms. They knew how to read the state of an electron's spin and now they can write the spin state.

    Good news indeed. The team's next goal is to combine pairs of quantum bits to create a two-qubit logic gate – the basic processing unit of a quantum computer.

    http://phys.org/news/2012-09-single-atom-writer-landmark-quantum.html
     
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  24. Drone

    Drone

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    [​IMG]

    Laser beam exhibiting a superposition of 100 right-handed and 100 left-handed quanta of orbital angular momenta, resulting in 200 bright spots on the inner ring.

    Sounds exciting.

    http://phys.org/news/2012-11-world-entanglement-quanta.html
     
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  25. 3870x2

    3870x2

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    We are getting dangerously close to quantum computing. It is great to see something like this in my lifetime.

    postCount++; (this works!)
     

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