Quantum Darwinism and the Dust Grain
March 13, 2022

Archived from an original LinkedIn post by Brian Greenforest.

Original Post

"A grain of dust one micrometer across, after being illuminated by the sun for just one microsecond, will have its location imprinted about 100 million times in the scattered photons.
It’s because of this redundancy that objective, classical-like properties exist at all. Ten observers can each measure the position of a dust grain and find that it’s in the same location, because each can access a distinct replica of the information. In this view, we can assign an objective “position” to the speck not because it “has” such a position (whatever that means) but because its position state can imprint many identical replicas in the environment, so that different observers can reach a consensus."

https://lnkd.in/g9bhQ44i

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