But the experiments were set up in ways that meant we could only use them to determine that this superposition occurred in ...

For the first time, a team of physicists in Austria has carried out an experiment that appears to verify the principle of indefinite causal order: an idea that suggests that timelines of events can ...

The study of quantum gravity seeks a synthesis between quantum mechanics and general relativity, and Causal Dynamical Triangulations (CDT) has emerged as a promising nonperturbative approach. In CDT, ...

(via Sabine Hossenfelder) To us normal people, cause and effect are linked together in a distinct order. The cause occurs first, and the effect follows after. But according to a new paper, that causal ...

Researchers at IPhT (CEA, CNRS) and the Universitat Autònoma de Barcelona have shown that gravity—and with it, ...

A quantum experiment shows that we can formally test if the order of events matters. I admit I'm no expert and do not know what I'm talking about, but I wish there was more explanation as to why we ...

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As an ordinary reader trying to make sense of the universe before breakfast, I was delighted by your feature on quantum causality. The idea of “causal bubbles” gave me a way to picture the quantum ...

The article on causality in quantum theory reminds us that, until an observer takes a measurement, we are confronted by a fog of possible alternatives and that the measurement will cause these ...