Can Objects Have Soulmates? | On Quantum Entanglement & Spooky Action At A Distance

How can objects separated by light years of distance still be linked in such a way that interacting with, measuring, or perturbing the state of one immediately somehow changes or sets the state of the other?

Even Albert Einstein had trouble believing in quantum entanglement. It even made him question quantum mechanics. Einstein and others considered such behavior impossible because it seemed to violate the idea of local realism and causality itself. Einstein referred to entanglement as "spooky action at a distance." He argued that it was ridiculous and therefore quantum mechanics itself must therefore be incomplete.

The trouble is quantum entanglement is not impossible. In fact, there is no debate about the existence of this effect. Entanglement or spooky action at a distance is being used in real world technology today.

In 2016, China launched the world’s first quantum communications satellite in their $100m Quantum Experiments at Space Scale (QUESS) mission. In 2020, researchers reported quantum entanglement between something actually visible to the naked eye, a millimeter-sized mechanical oscillator and a distant cloud of atoms.

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