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Physics: Electron Ball Probes "House of Mirrors"

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Science  06 Oct 1995:
Vol. 270, Issue 5233, pp. 32
DOI: 10.1126/science.270.5233.32

Summary

By confining 1000 electrons in a magnetic trap, physicists have found a way to test one of the fundamental theories of physics, quantum electrodynamics, with exquisite precision.