4 ms·

I know they are trying to dumb it down, but I think they are leaving out some fundamental elements of the puzzle here. Bob interprets the message incorrectly so

I know they are trying to dumb it down, but I think they are leaving out some fundamental elements of the puzzle here. Bob interprets the message incorrectly sometimes and no reason is offered for why or how often. They say the observers get contradicting answers sometimes, but that revelation seems anticlimactic considering I have no reason the believe Bob's observer should observe outcomes matching Alice's observer any more often than Bob himself can "guess" the result. I might need to dig into the original paper: https://www.nature.com/articles/s41467-018-05739-8 https://www.nature.com/articles/s41467-018-05739-8

roywiggins 8y ago
On first glance it seems like they're building a sort of Godel sentence- a self-referential experiment that forces things to end up looking contradictory.
- AstralStorm 8y ago
  Isn't the measurement enough to change the quantum state of the system? What is "got told" in this experiment? Does it involve creating an entangled state? In which way? Otherwise, the story is classical information, which means a measurement must have been done or said story is not tied to quantum state at all. The whole idea sounds like making classical guesses is supposed to somehow affect quantum states in a predictable or any way.
- Severian 8y ago
  I was thinking something along similar lines. Hawking had a lecture[1] regarding Godel, which indicate incomplete or inconsistent models of systems. What we may think as inconsistent is probably an incomplete model. Or as Hawking addressed in the lecture: " According to the positivist philosophy of science, a physical theory is a mathematical model. So if there are mathematical results that can not be proved, there are physical problems that can not be predicted." [1] http://www.hawking.org.uk/godel-and-the-end-of-physics.html http://www.hawking.org.uk/godel-and-the-end-of-physics.html

roywiggins 8y ago

On first glance it seems like they're building a sort of Godel sentence- a self-referential experiment that forces things to end up looking contradictory.

AstralStorm 8y ago
Isn't the measurement enough to change the quantum state of the system? What is "got told" in this experiment? Does it involve creating an entangled state? In which way? Otherwise, the story is classical information, which means a measurement must have been done or said story is not tied to quantum state at all. The whole idea sounds like making classical guesses is supposed to somehow affect quantum states in a predictable or any way.
Severian 8y ago
I was thinking something along similar lines. Hawking had a lecture[1] regarding Godel, which indicate incomplete or inconsistent models of systems. What we may think as inconsistent is probably an incomplete model. Or as Hawking addressed in the lecture: " According to the positivist philosophy of science, a physical theory is a mathematical model. So if there are mathematical results that can not be proved, there are physical problems that can not be predicted." [1] http://www.hawking.org.uk/godel-and-the-end-of-physics.html http://www.hawking.org.uk/godel-and-the-end-of-physics.html