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Thread: Quantum entanglement loophole quashed by quasar light

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    Default Quantum entanglement loophole quashed by quasar light

    That's what happens when you let quasars decide what to measure.

    With the help of two extremely bright quasars located more than 7 billion light-years away, researchers recently bolstered the case for quantum entanglement — a phenomenon Einstein described as "spooky action at a distance" — by eliminating one classical alternative: The freedom-of-choice loophole.

    Quantum connection

    Of the many mindboggling facets of quantum mechanics, one of the most intriguing is the idea of quantum entanglement. This occurs when two particles are inextricably linked together no matter their separation from one another. Although these entangled particles are not physically connected, they still are able to share information with each other instantaneously — seemingly breaking one of the most hard-and-fast rules of physics: No information can be transmitted faster than the speed of light.

    As far-out as the idea seems, quantum entanglement has been proven time and time again over the years. When researchers create two entangled particles and independently measure their properties, they find that the outcome of one measurement influences the observed properties of the other particle.

    But what if the apparent relationship between particles is not due to quantum entanglement, but instead is a result of some hidden, classical law of physics? In 1964, physicist John Bell addressed this question by calculating a theoretical limit beyond which correlations can only be explained by quantum entanglement, not classical physics. However, as is often the case, there are loopholes.

    Freedom of choice?

    One of the most stubborn of these loopholes is the so-called "freedom-of-choice" loophole, which suggests a hidden classical variable can influence how an experimenter decides to measure seemingly entangled particles. This causes the particles to appear quantumly correlated even when they are not.

    To help constrain the impact of the freedom-of-choice loophole, the authors of the new study used extremely distant quasars (exceptionally bright and energetic galactic cores) to decide which properties of entangled particles to measure. By allowing the quasars' light to "choose" what properties to measure, the researchers effectively removed the freedom-of-choice loophole from the experiment. This is because the quasars are located 7.8 and 12.2 billion light-years away, so their observed light was emitted billions of years before the researchers even conceived of the experiment.

    “If some conspiracy is happening to simulate quantum mechanics by a mechanism that is actually classical, that mechanism would have had to begin its operations — somehow knowing exactly when, where, and how this experiment was going to be done — at least 7.8 billion years ago," said co-author Alan Guth, a physics professor at MIT, in a press release. "That seems incredibly implausible, so we have very strong evidence that quantum mechanics is the right explanation."

    In fact, according to Guth, the probability that a classical process could explain their results is about 10-20, or 1 in 100 billion billion.

    “The Earth is about 4.5 billion years old, so any alternative mechanism — different from quantum mechanics — that might have produced our results by exploiting this loophole would’ve had to be in place long before even there was a planet Earth," adds co-author David Kaiser of MIT. “So we’ve pushed any alternative explanations back to very early in cosmic history.”




    More:

    http://www.astronomy.com/news/2018/0...m-entanglement


    This finding made me think on what it means on an esoteric level let alone on a metaphysical level. I think it even questions what time and space really is.
    I think its beyond 'spooky' as Einstein defined this action.

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    Default Re: Quantum entanglement loophole quashed by quasar light

    LOL. Scientist make me laugh when they talk as if they know what they're talking about when the smallest amount of common sense tells you they can't possibly.

    It's also funny how each generation thinks the science of the day has finally got the right answer and how the science of previous generations was so backward. Truth be told, scientists have got more things wrong than any other profession.

    That said, they are able to get the simple, basic things right and have done some clever stuff but when it comes to the universe, billions of years and things travelling at hundreds of thousands of kilometres a second, they are like children. Incidentally, Einstein never said nothing could travel faster than the speed of light. He said nothing could be accelerated to faster than the speed of light. But some things are already going faster...

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    Default Re: Quantum entanglement loophole quashed by quasar light

    Hi there 5th, love it if you could site some research.

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    Default Re: Quantum entanglement loophole quashed by quasar light

    Quote Posted by Kristin (here)
    Hi there 5th, love it if you could site some research.
    A tachyon travels in excess of the speed of light and can only do so. That is, it never travels at speeds less than the speed of light.

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