The main idea of quantum mechanics is that an
object like an electron or a photon behaves as both a particle and a wave… The
other weird characteristic of quantum particles is that they can exist in
multiple places at once, a phenomenon called superposition. But superposition is a fragile state. The moment that
scientists try to measure the particles, the superposition state collapses and
the particles come to exist in only one spot. Before the particles are
disturbed, they exist in multiple places all at once.
Quantum entanglement is superposition on
a larger scale… Particles become entangled when they interact
with each other. Entanglement means that when an action is performed on one
particle, it directly affects that particle's entangled partner no matter how
far apart they are.
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