GoKawiilNorthwestern Physicists Trap Single Positron for Months in Quantum Cyclotron
A Northwestern University team led by Gerald Gabrielse used a device called a single-positron quantum cyclotron to hold one positron—the antimatter counterpart of an electron—in a vacuum near absolute zero for several months. The extreme cooling let researchers precisely manipulate the particle's quantum states using electric and magnetic fields without destroying it, a result published in Physical Review Letters.