What is the deepest level of reality? In this Quanta explainer, Vijay Balasubramanian, a physicist at the University of Pennsylvania, takes us on a journey through space-time to investigate what it’s ...
The elements of a Feynman diagram. Back in the late 1940s, a lot was still being discovered about quantum electrodynamics (QED) as a relativistic quantum field theory of electrodynamics.
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