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Northwestern University positron trapping experiment
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2026-10-25 13:34 UTC → 2026-10-28 20:45 UTC ·
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Physicists at Northwestern University University, led by Gerald Gabrielse, have successfully captured demonstrated the first single-positron quantum cyclotron. This breakthrough allows for the isolation and controlled manipulation of a single positron, the positron—the antimatter counterpart to an electron, for several months. Using a Penning trap, electron—for approximately one month. To prevent the research particle from annihilating upon contact with ordinary matter, the team utilized electromagnetic fields a Penning trap within a 5.6-tesla superconducting solenoid to suspend the particle positron in a near-perfect vacuum, preventing it from touching matter and annihilating. The experiment involved cooling vacuum. By employing a dilution refrigerator to cool the positron environment to approximately 0.3 Kelvin roughly 300 millikelvin, researchers reduced the particle's motion enough to reach observe and govern quantum state transitions between its lowest possible quantum energy state. By employing tuned microwaves, researchers were able levels. This setup enables a non-destructive reading technique to manipulate track the particle and induce specific particle's quantum jumps, states, allowing it to behave like an artificial atom. This setup, described as a single-positron quantum cyclotron, enables unprecedented precision in measuring the positron’s magnetic moment. Published in the journal Physical Review Letters, the study research provides a new method to test the fundamental symmetries CPT symmetry, a principle of physics and the Standard Model. These Model stating that physical laws remain unchanged if charge, parity, and time are simultaneously reversed. Specifically, the experiment seeks to determine if the positron's magnetic moment is equal in magnitude and opposite in sign to that of the electron. Such precise comparisons between matter and antimatter aim to probe physics beyond the Standard Model and investigate why the visible universe is composed primarily of matter rather than an equal mix of matter and antimatter.
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- 2026-10-28 20:45 UTC Northwestern University positron trapping experiment
- 2026-10-25 13:34 UTC Northwestern University positron trapping experiment
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