Re: [TML] O/T: Quantum entanglement
Thomas Jones-Low 13 May 2020 22:41 UTC
On 5/13/2020 3:57 PM, David Shaw wrote:
> While we're talking physics...
>
> Every description I've read, watched or heard about quantum entanglement says
> that, when you change the properties of one of the particles, the properties of
> the other instantaneously change, regardless of how far apart they are.
>
> Really? Instantaneous? Or do they mean 'at the speed of light which, given the
> scale of the experiments we've carried out is so quick that it is, for all
> practical purposes, instantaneous'?
>
> David Shaw
To my understanding the quantum entanglement doesn't transmit any information,
so it can operate in "instantaneous" time. The idea is, for example, if you put
two electrons in close proximity they can't have the same spin direction. If you
then pull them apart without measuring which electron has which spin, you can
separate them by any distance. and if you measure the spin on one electron, you
know "instantly" the other must have the opposite spin. But you can't change the
spin of either electron.
--
Thomas Jones-Low
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