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Stefan Ulmer

Stefan Ulmer

BASE Spokesperson and Principal Investigator

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The quest to trap antimatter

New Capabilities

Leading antimatter research at CERN and RIKEN

CERN's BASE collaboration kept a single antiproton oscillating between quantum states for 50 seconds—long enough to create the world's first antimatter qubit. The breakthrough, published in Nature in July 2025, opens the door to measuring antiproton properties with 10 to 100 times more precision than before. It's not about building quantum computers. It's about answering why the universe exists at all.

Updated Jan 7