1. Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Quantum Entanglement

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

  1. ShiBDiB

    ShiBDiB

    Joined:
    Jul 21, 2008
    Messages:
    4,375 (1.58/day)
    Thanks Received:
    1,011
    Location:
    Clifton Park, NY
    I mean its neat.. I just hope my taxes didnt pay for this
     
  2. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    I found an interesting article where physicists theorize entangled quantum batteries. Here's a snippet:

    A dream come true? A perfect battery which doesn't lose any energy when it's transferred.
    By the way nature uses such "batteries" for ages. Photosynthesis achieves perfect energy transfer but nobody knows how. Ok ok ... theories are always easier than real life.
     
    remixedcat says thanks.
  3. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    15,869 (3.70/day)
    Thanks Received:
    13,811
    let's talk about the entangled sisters that you have sex with
     
    remixedcat and AlienIsGOD say thanks.
    10 Year Member at TPU
  4. NinkobEi

    NinkobEi

    Joined:
    Nov 27, 2006
    Messages:
    2,044 (0.61/day)
    Thanks Received:
    338
    This thread is only for things that could actually happen. Two diamonds connected across trillions of miles? yep. two sisters you'd want to have sex with also that want to have sex with you? Not plausible. Literally impossible. :roll:
     
  5. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    15,869 (3.70/day)
    Thanks Received:
    13,811
    the sisters is more probable than some funky battery.
     
    10 Year Member at TPU
  6. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
  7. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    Tripartite entanglement is achieved:

    Nature.com
     
    Last edited: Mar 8, 2014
    remixedcat says thanks.
  8. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046


     
    remixedcat says thanks.
  9. Steevo

    Steevo

    Joined:
    Nov 4, 2005
    Messages:
    9,172 (2.44/day)
    Thanks Received:
    1,723

    If you understood the principals of quantum entanglement you would realize how silly it is to ask that question on so many levels.

    First Quantum entanglement is the classical equal of having mirrored pairs, color is used as a way to think about a "state" of an object, not as an actual color, at quantum levels color does not exist as our perception of color is merely electromagnetic radiation of a specific wavelength exciting rods and cones and thus neurons, and this radiation is measured in nm. [​IMG]

    Whereas "If the size of the quantum dot is small enough that the quantum confinement effects dominate (typically less than 10 nm), the electronic and optical properties are highly tunable. Splitting of energy levels for small quantum dots due to the quantum confinement effect."

    http://en.wikipedia.org/wiki/Quantum_dot

    http://en.wikipedia.org/wiki/Quantum_entanglement

    Now imagine one photon that gets split into two lower state photons, each will represent half of the original state of the original photon. They are mirrored in the fact they each have half the energy of the original photon, and are equal but opposite. So if one is polarized in the Y space the other will be polarized in the X space, this follows the conservation laws. The reason this cannot lead to FTL communications is the same reason sweeping a laser across the surface of the moon from the earth does not cause your laser beam to travel faster than light.

    ............X
    A<
    ............Y

    A knows its state or entropy, the same amount of time passes for Y and X and the quantum superposition collapses when X or Y are measured, but neither can know the position of each other unless they originally knew the position of A, and neither knows the state of the other until one or both are measured which by measurement causes the unknown state to collapse, the only way to know all of this is to have the measurement taken at the exact same time in order to preserve data, which then brings us back to time being the great equalizing factor.
     
    10 Year Member at TPU 10 Million points folded for TPU
  10. remixedcat

    remixedcat

    Joined:
    May 13, 2010
    Messages:
    3,863 (1.84/day)
    Thanks Received:
    1,154
    Dude this. in. networking. now!!!
     
  11. Steevo

    Steevo

    Joined:
    Nov 4, 2005
    Messages:
    9,172 (2.44/day)
    Thanks Received:
    1,723
    Huh?
     
    10 Year Member at TPU 10 Million points folded for TPU
  12. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    A team of researchers at Delft University in the Netherlands is reporting in a paper they have had published in the journal Science, that they have successfully used entanglement as a means of communication.

    Teleportation, is of course, a means of moving an object from one place to another without it having to travel between them. Thus far examples of it have only been seen in science fiction movies. The idea of moving information in similar fashion, however, has met with some, albeit limited success. The idea is to use the concept of entanglement of particles as a means of conveyance. It's supposed to work because of the strange interconnectedness of the two particles (whatever happens to one, automatically happens to the other, regardless of the distance between them). Such a property should allow then, for the exchange of information. If the spin state of one qubit is altered, then it should be automatically altered in the other qubit.

    Researchers trapped electrons in diamonds at very low temperatures and shot them with lasers, resulting in the creation of qubits. The diamonds serve as really tiny prisons, holding the electrons in place. Held as they were, the researchers were able to cause a spin state to exist and then to read it at both locations, which meant that information had been conveyed.

    [​IMG]

    http://phys.org/news/2014-05-team-accurately-teleported-quantum-ten.html
     
    remixedcat says thanks.
  13. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    15,869 (3.70/day)
    Thanks Received:
    13,811
    Misleading, no information is actually transmitted.

     
    10 Year Member at TPU
  14. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    ^ lolz thanks for info, so they flopped?
     
  15. Steevo

    Steevo

    Joined:
    Nov 4, 2005
    Messages:
    9,172 (2.44/day)
    Thanks Received:
    1,723
    I have had an idea, brewing in my noggin for quite awhile, after much reading and thinking. quarks are just pools of energy that are vibrating and moving through spacetime fabric, causing it to vibrate, and quantum entanglement is just when we managed to get enough quarks vibrating in spacetime, still bound by spacetime fabric if you will, much like two cans and a string can transmit energy at the speed of sound through the string, we are transmitting (*implied) data by merely observing the phase change from probability state and effect of spacetime vibrations that occur in the frequency domain that also effect the other entangled particle (same material) due to its resonant frequency, much in the same way I have to tune antennas to receive a specific frequency.
     
    10 Year Member at TPU 10 Million points folded for TPU
  16. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    15,869 (3.70/day)
    Thanks Received:
    13,811
    The authors at physorg flopped and wrote a headline that attracts internet people. The scientists certainly wrote it correctly in scientist speak in their abstract http://www.sciencemag.org/content/early/2014/05/28/science.1253512 .. normal humans which includes some internet authors read "teleportation" and think "star trek".

    what is the string between cans made of? are you proposing the ether ? http://www.physicsforums.com/showthread.php?t=304704
    and to the best of our knowledge, and matching all experimental data, quantum does not work like that, or any variation, that resembles classical mechanics

    the double slit experiment is a good, and simple, starting point to learn about the weirdness of quantum mechanics
     
    10 Year Member at TPU
  17. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
  18. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    15,869 (3.70/day)
    Thanks Received:
    13,811
    yes, but it means something different for quantum scientists than for regular people
     
    10 Year Member at TPU
  19. Steevo

    Steevo

    Joined:
    Nov 4, 2005
    Messages:
    9,172 (2.44/day)
    Thanks Received:
    1,723
    More of the idea that gluons/elementary particles are quantum foam, and the possibility of them existing as interactions of the dark matter that is holding our universe together where bubbles if you will meet and allow enough energy in one place to pop into existence, and only with the foam/spacetime can particles be real, and with this it allows for http://en.wikipedia.org/wiki/Inelastic_scattering to occur when energy is seemingly added or removed from a interaction.


    I get the double slit, twice as nice. And also the experiments carried out and the use of polarization filters to blind check it. But the idea of why and how and making it match with what I already know of signal propagation, pockets of denser air can cause signal timing changes, exactly why we use multiple frequencies with GPS, you can calculate ionosphere error by comparing the timing signature of one signal to the carrier phase offset of another due to atmospheric errors and reduce errors introduced by multiple magnitudes.
     
    Last edited: May 31, 2014
    10 Year Member at TPU 10 Million points folded for TPU
  20. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    Historic Delft Experiment tests Einstein's “God does not play dice”

    The experiment gives the strongest refutation to date of Albert Einstein's principle of 'local realism', which says that the universe obeys laws, not chance, and that there is no communication faster than light.

    And 'dice' made in Barcelona:

    [​IMG]

    Maaaan, I want that 'dice'. It's the fastest quantum random number generator to date. Not that cheap shit you find on some online random generators.

    Whateva, don't wanna copypaste, so read it here
     
    remixedcat says thanks.
  21. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
  22. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    Qubits in silicon .... sounds good to me.

    Australian researchers have figured out a way to deal with errors in quantum computers, giving them the essential architecture that may help this team become the first to build a functioning quantum computer in silicon.

     
  23. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    Researchers from the Centre for Quantum Technologies (CQT) at the National University of Singapore and the University of Seville in Spain have reported the most extreme ‘entanglement’ between pairs of photons ever seen in the lab.

    Local realism

    Entanglement says that two particles, such as photons, can be married into a joint state. Once in such a state, either particle observed on its own appears to behave randomly. But if you measure both particles at once, you notice they are perfectly synchronized.

    Albert Einstein was famously troubled by this prediction of quantum physics. He didn't like the randomness that came with just one particle. He said “God does not play dice”. He didn't like the correlations that came with two particles, either. He referred to this as “spooky action at a distance”.

    Entangled to the max

    In the lab in Singapore researchers performed a Bell test. Their setup pushes the entanglement towards its theoretical maximum. They make entangled photons by shining a laser through a crystal. The photons interact with the crystal in such a way that occasionally, one splits into two and the pair emerges entangled. The team control the photons with an array of lenses, mirrors and other optical elements to optimize the effect.

    The researchers looked at 33.2 million optimized photon pairs. Each pair was split up and the photons measured separately, then the correlation between the results quantified.

    In such a Bell test, the strength of the correlation says whether or not the photons were entangled. The measures involved are complex, but can be reduced to a simple number. Any value > 2 is evidence for quantum effects at work. But there is also an upper limit.

    Quantum physics predicts the correlation measure cannot get any bigger than 2√2 ~ 2.82843. In the experiment at CQT, they measure 2.82759 ± 0.00051 - within 0.03% of the limit. If the peak value were the top of Everest, this would be only 2.6 m below the summit.

    [​IMG] [​IMG]
     
  24. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
  25. Drone

    Drone

    Joined:
    Sep 1, 2010
    Messages:
    3,873 (1.94/day)
    Thanks Received:
    3,046
    Quantum entanglement at ambient conditions in a macroscopic solid-state spin ensemble

    [​IMG]

    Entanglement is one of nature's most elusive phenomena. Producing entanglement between particles requires that they start out in a highly ordered state, which is disfavored by thermodynamics, the process that governs the interactions between heat and other forms of energy. This poses a particularly formidable challenge when trying to realize entanglement at the macroscopic scale, among huge numbers of particles.

    “The macroscopic world that we are used to seems very tidy, but it is completely disordered at the atomic scale. The laws of thermodynamics generally prevent us from observing quantum phenomena in macroscopic objects,” said Paul Klimov, a graduate student in the University of Chicago’s Institute for Molecular Engineering and lead author of new research on quantum entanglement. The institute is a partnership between UChicago and Argonne National Laboratory.

    Previously, scientists have overcome the thermodynamic barrier and achieved macroscopic entanglement in solids and liquids by going to ultra-low temperatures (-270 degrees Celsius) and applying huge magnetic fields (1000 times larger than that of a typical refrigerator magnet) or using chemical reactions. In the Nov. 20 issue of Science Advances, Klimov and other researchers in David Awschalom's group at the Institute for Molecular Engineering have demonstrated that macroscopic entanglement can be generated at room temperature and in a small magnetic field.

    The researchers used infrared laser light to preferentially align the magnetic states of thousands of electrons and nuclei and then electromagnetic pulses, similar to those used for conventional magnetic resonance imaging (MRI), to entangle them. This procedure caused pairs of electrons and nuclei in a macroscopic 40 micrometer-cubed volume (the volume of a red blood cell) of the semiconductor SiC to become entangled.

    “We know that the spin states of atomic nuclei associated with semiconductor defects have excellent quantum properties at room temperature,” said Awschalom, Liew Family Professor in Molecular Engineering and a senior scientist at Argonne National Laboratory. “They are coherent, long-lived and controllable with photonics and electronics. Given these quantum ‘pieces,’ creating entangled quantum states seemed like an attainable goal.”
     

Currently Active Users Viewing This Thread: 1 (0 members and 1 guest)