A pivotal quantum theory holds up even in extreme electric fields
Quantum electrodynamics was put to the test with highly charged uranium ions
To test the theory of quantum electrodynamics in strong electromagnetic fields, scientists used highly charged uranium ions created at the GSI Helmholtz Centre in Darmstadt, Germany, and contained in the facility's experimental storage ring (shown).
J. Mai/GSI Helmholtzzentrum für Schwerionenforschung GmbH