Physicist Attempts to Send Signal Backwards in Time

If successful he would receive the signal before he sends it.

If his experiment with splitting photons actually works, says University of Washington physicist John Cramer, the next step will be to test for quantum “retrocausality.”

That’s science talk for saying he hopes to find evidence of a photon going backward in time.

“It doesn’t seem like it should work, but on the other hand, I can’t see what would prevent it from working,” Cramer said. “If it does work, you could receive the signal 50 microseconds before you send it.”

(via reddit)

Comments

11 Comments so far. Leave a comment below.
  1. Gwenny,

    But, what happens if he decides not to send the signal after receiving it? What happens to the time/space continuum then?

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  2. Americano,

    Oh my god, my brain is hurting now. TILT!

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  3. Michael,

    Ummm… No matter how hard I try, I can’t make that make sense.

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  4. McGee,

    You people just aren’t thinking fourth-dimensionally!

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  5. pvc,

    You give up causality or you give up locality.

    This ain’t your father’s materialism anymore.

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  6. gruggach,

    I love the guy’s attitude. He doesn’t expect it to work, but he can’t find reasons why it shouldn’t. What a damn interesting article!

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  7. if it goes back in time the time would have already passed.

    HE’S not going back in time.

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  8. If I could send something to the past it wouldn´t be precisely a proton particle, because I might miss the message (a brick, an inflatible doll or $3k might call my attention). // Following Gwenny´s paradox: what if the scientist, after recieving the signal, decides to send it to the future instead of the past?

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  9. My thoughts on this experiment is: That’ll be the day.

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  10. pvc,

    If I were going to send myself something backwards in time it would be a copy of the Wall Street Journal – especially the closing numbers pages.

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  11. Kelly,

    No, the first thing you want to send back in time is a clearly worded message. DO NOT SEE ANY OF THE STAR WARS PREQUELS

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