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Trapped Positron Boosts Antimatter Measurements 30-Fold Accuracy

By Drooid · Oct 25, 2026, 10:02 PM UTC · How we work

Summary

Story summary

Northwestern University physicists trapped a single positron in a vacuum for months.
They cooled the positron to 0.3 K above absolute zero using a 5.6-tesla Penning trap.
Microwave pulses induced quantum jumps and spin flips while preserving the positron’s quantum state.
The quantum cyclotron could improve antimatter measurement precision by about thirty times.
No magnetic-moment difference between the positron and electron has been observed, according to the Physical Review Letters report.

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Story summary

Northwestern University physicists trapped a single positron in a vacuum for months.
They cooled the positron to 0.3 K above absolute zero using a 5.6-tesla Penning trap.
Microwave pulses induced quantum jumps and spin flips while preserving the positron’s quantum state.
The quantum cyclotron could improve antimatter measurement precision by about thirty times.
No magnetic-moment difference between the positron and electron has been observed, according to the Physical Review Letters report.