Causal Relationships

This article is four years old but has some very interesting discussions on the topic of causal relationships and the quantum.

"In classical physics – and everyday life – there is a strict causal relationship between consecutive events. If a second event (B) happens after a first event (A), for example, then B cannot affect the outcome of A. This relationship, however, breaks down in quantum mechanics because the temporal spread of a particles’s wave function can be greater than the separation in time between A and B. This means that the causal order of A and B cannot be always be distinguished by a quantum particle such as a photon."

https://physicsworld.com/a/quantum-mechanics-defies-causal-order-experiment-confirms/

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