The Present Can Effect The Past. The Future Can Effect The Present.

Photo via flickr by kwerfeldein

Retrocausality is the idea that the present can affect the past, and the future can affect the present. Strange as it sounds, retrocausality is perfectly permissible within the known laws of nature. It has been debated for decades, mostly in the realm of philosophy and quantum physics.

Researchers experiments may initially hold retrocausality’s feet to the fire. But, if retrocausality is confirmed —and that is a huge if—it would overturn our most cherished notions about the nature of cause and effect and how the universe works.

If retrocausality does exist, it says something profound about how the universe works. “It has the potential to solve what is one of the biggest problems in modern physics,” says Huw Price, head of Sydney’s Centre for Time. It goes back to quantum entanglement and “nonlocality”—one particle instantaneously affecting another, even from the other side of the galaxy.

If we measure one entangled particle that sends a wave backward through time to the moment at which the pair was created, the signal would not need to move faster than light; it could simply retrace the first particle’s path through space-time, arriving back at the spot where the two particles were emitted. There, the wave can interact with the second particle without violating relativity.

“I’m going with my gut here,” says Avshalom Elitzur, a physicist and philosopher at Bar-Ilan University in Israel, “but I believe that when we finally find the theory we’re all looking for, a theory that unifies quantum mechanics and relativity, it will involve retrocausality.”

via SFGate

One response to “The Present Can Effect The Past. The Future Can Effect The Present.”

  1. Janine says:

    The LHC, which made history today, March 30th, has been dogged with problems since its first test in August 2008. It shut down 9 days after it first went live, and made headlines late 2009 when a bird apparently dropped a “bit of baguette” into the accelerator, making the machine shut down again. In a phone interview with CNN London, Professor Holger Bech Nielsen theorized about the shut down, that the Higgs boson particle traveled back in time to shut down itself: “It would look as if the future has an influence on what happens today or yesterday, so it would look as if some effect from the future goes back to us today.” He believes that the Higgs boson particle maybe too important to nature that it ripples back in time to sabotage the machine that created it.” Perhaps?

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