- #1
San K
- 911
- 1
Understanding communication via QE - is filtering the only obstacle? to FTL communication
FTL = faster than light
In a two-photon (i.e. entangled photons) double slit or similar experiments -
Information cannot be sent FTL because there are no patterns (mapping to which-way or no-which-way) on the screen yet.
to get the patterns we have to filter out noise etc
to filter out noise we have to compare/match both the photons via co-incidence counter.
to compare both the photons we need a classical channel which will of course work at or slower than the speed of lightQuestion 1:
If Alice and Bob were sitting in a relatively noiseless (i.e free from stray photons, enough to discern an interference pattern) environment, could they, in principle, communicate FTL?
Note: It may not be possible to have an environment that is free of stray photons. however for now let's ignore this fact.Question 2:
(how) Does FTL communication, involving massless/energy-less transmission method, violate relativity?
Note: Massless/energy-less information transfer might not be possible and this might be a fundamental, however for now we are ignoring this point.
FTL = faster than light
In a two-photon (i.e. entangled photons) double slit or similar experiments -
Information cannot be sent FTL because there are no patterns (mapping to which-way or no-which-way) on the screen yet.
to get the patterns we have to filter out noise etc
to filter out noise we have to compare/match both the photons via co-incidence counter.
to compare both the photons we need a classical channel which will of course work at or slower than the speed of lightQuestion 1:
If Alice and Bob were sitting in a relatively noiseless (i.e free from stray photons, enough to discern an interference pattern) environment, could they, in principle, communicate FTL?
Note: It may not be possible to have an environment that is free of stray photons. however for now let's ignore this fact.Question 2:
(how) Does FTL communication, involving massless/energy-less transmission method, violate relativity?
Note: Massless/energy-less information transfer might not be possible and this might be a fundamental, however for now we are ignoring this point.
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