MilestoneHardwareConfirmed
Caltech traps 6,100 atom qubits in a single array of laser tweezers
Sep 24, 2025
Caltech physicists reported in Nature an array of more than 6,100 cesium-atom qubits held by about 12,000 laser "tweezers", which Caltech calls the largest qubit array ever assembled. The qubits kept their quantum state for about 13 seconds; linking them through entanglement is the next step.
Why it matters
Error-corrected quantum computers will need hundreds of thousands of qubits; this shows atom arrays can reach thousands without losing quality, though the qubits were not yet computing together.
Manuel Endres · Caltech
Sources (3)
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Nature
A tweezer array with 6,100 highly coherent atomic qubits
“Here we experimentally realize an array of optical tweezers trapping more than 6,100 neutral atoms in around 12,000 sites, simultaneously surpassing state-of-the-art performance for several metrics that underpin the success of the platform.”
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Caltech
Caltech Team Sets Record with 6,100-Qubit Array
“Now, in a step toward this vision, Caltech physicists have created the largest qubit array ever assembled: 6,100 neutral-atom qubits trapped in a grid by lasers. Previous arrays of this kind contained only hundreds of qubits.”
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The Quantum Insider
Caltech Team Sets Record with 6,100-Qubit Array
“Looking ahead, the researchers plan to link the qubits in their array together in a state of entanglement, where particles become correlated and behave as one.”
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