/u/Yenraven's posts in /r/askscience

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What would happen if you passed two entangled photons through two identical quantum eraser setups? What if you collapsed the polarization of one of the photons before it entered the experiment?

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If photons in a super position act differently than photons in a collapsed state, like what you see in the classic double slit experiment, then why can't you change the way two entangled photons act by collapsing the superposition of one?

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Could a ship that was currently across, not beyond, our Hubble sphere ever reach Earth?

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Why does D0 in the delayed choice quantum eraser never display a visible interference pattern?

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In a double slit, would being able to tell which path from when a photon arrived collapse the wave function?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What would happen if you passed two entangled photons through two identical quantum eraser setups? What if you collapsed the polarization of one of the photons before it entered the experiment?	2
If photons in a super position act differently than photons in a collapsed state, like what you see in the classic double slit experiment, then why can't you change the way two entangled photons act by collapsing the superposition of one?	1
Could a ship that was currently across, not beyond, our Hubble sphere ever reach Earth?	1
Why does D0 in the delayed choice quantum eraser never display a visible interference pattern?	1
In a double slit, would being able to tell which path from when a photon arrived collapse the wave function?	1