Spooky correlations between separate photons were demonstrated
in an experiment at the Royal Signals and Radar Establishment in
England. In this simplified depiction, a down-converter sends pairs
of photons in opposite directions. Each photon passes through a
separate two-slit apparatus and is directed by mirrors to a detector.
Because the detectors cannot distinguish which slit a photon passes
through each photon goes both ways generating an interference
pattern.… Yet each photon’s momentum is also correlated with its
partner’s. A measurement showing a photon going through the
upper left slit would instantaneously force its distant partner to go
through the lower slit on the right.
I’m so glad that paper says measurement is entanglement because what I’ve been thinking is that consecutive photons, in a dimmed to one photon at a time two-slit experiment, are the ones interfering not the photon interfering with itself.
Also everything so far from this series says that polarization also determines the slit that is chosen.
What would happen if you had three sources on a rotating platform each taking turns firing at the two slits?
Hal Finney: From that pdf
Spooky correlations between separate photons were demonstrated in an experiment at the Royal Signals and Radar Establishment in England. In this simplified depiction, a down-converter sends pairs of photons in opposite directions. Each photon passes through a separate two-slit apparatus and is directed by mirrors to a detector. Because the detectors cannot distinguish which slit a photon passes through each photon goes both ways generating an interference pattern.… Yet each photon’s momentum is also correlated with its partner’s. A measurement showing a photon going through the upper left slit would instantaneously force its distant partner to go
through the lower slit on the right.
I’m so glad that paper says measurement is entanglement because what I’ve been thinking is that consecutive photons, in a dimmed to one photon at a time two-slit experiment, are the ones interfering not the photon interfering with itself.
Also everything so far from this series says that polarization also determines the slit that is chosen.
What would happen if you had three sources on a rotating platform each taking turns firing at the two slits?