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A new calculation of the electron's self-energy improves determination of fundamental constants
To be exact, they calculated the "two-loop" electron self-energy. Self-energy is the energy a particle (here, an electron) has as a result of changes that it causes in its environment. For example ...
Nature13d
Cooling electrons one by one
The superconducting energy gap acts as an efficient energy filter for electrons at low temperature. Second, electron transport through the copper island is governed by a phenomenon known as ...