Physicists trap single antimatter particle for 57 days in precision quantum symmetry milestone
CERN researchers isolate an antiproton in a cryogenic Penning trap for nearly two months, measuring fundamental magnetic properties with unprecedented accuracy.
Technology news
Physicists with the BASE collaboration at CERN have achieved an unprecedented precision milestone, successfully trapping and isolating a single antiproton inside a cryogenic Penning trap for 57 continuous days. Antimatter particles are famously fragile and difficult to observe because immediate contact with normal matter triggers instant mutual annihilation, making sustained confinement one of the most demanding engineering challenges in experimental physics.
The research team suspended the antiparticle using ultra-stable superconducting magnetic coils and high-frequency electrostatic potentials held within an extreme vacuum chamber cooled near absolute zero. The extended confinement window allowed physicists to perform non-destructive quantum cyclotron resonance measurements, determining the antiproton’s magnetic moment with an extraordinary precision of parts per billion.
The experimental results confirm that protons and antiprotons exhibit near-perfect symmetry across all measured quantum properties, providing robust confirmation of fundamental CPT (charge, parity, time) invariance under the Standard Model. Physicists anticipate that continuing to enhance magnetic trap stabilization will ultimately enable tests sensitive enough to identify subtle symmetry violations that could solve why the observable universe consists almost exclusively of normal matter.