B

Bob

Person

Observer on photon B who can decide to keep or erase which-path information, influencing Alice’s observed patterns.

Mentioned in 1 video

We Were WRONG About the Quantum Eraser! ft. @LookingGlassUniverse​

We Were WRONG About the Quantum Eraser! ft. @LookingGlassUniverse​

PBS Space Time

Observer on photon B who can decide to keep or erase which-path information, influencing Alice’s observed patterns.