Mind-boggling quantum physics experiment could help scientists pinpoint the location of particles that appear to exist in several different places at once
It is a conundrum that has long perplexed physicists: how can a single particle appear to be in more than one place or state at once?
The phenomenon, known as a superposition, plays a significant role in quantum mechanics, but has proven extremely challenging to decipher.
While experiments may be able to induce a superposition, scientists are yet unable to actually measure it; doing so causes the superposition to ‘collapse.’
Now, researchers from Israel and Japan have devised an experiment that they say could finally help get to the bottom of the mystery.
In a superposition, photons – or, particles of light – appear to be able to interact with themselves to be in ‘two places at once.’
By the classic scenario, this means that if a single photon were fired at a barrier containing two parallel slits, it would somehow pass through both at the same time, Scientific American explains.
And, testing this is just as baffling as the phenomenon itself.
‘We know something fishy is going on in a superposition,’ physicist Avshalom Elitzur of the Israeli Institute for Advanced Research told Scientific American.
‘But you’re not allowed to measure it. This is what makes quantum mechanics so diabolical.’
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