Limits RegistryPUBLIC RECORD
Limits RegistryIn 2021, physicists at the University of Basel and ETH Zurich created and verified genuine multipartite entanglement among approximately 14.6 million ultracold atoms in a Bose-Einstein condensate — vastly exceeding earlier records that involved dozens or a few hundred individually addressable qubits, though the entanglement here was verified statistically rather than particle-by-particle.
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In 2021, physicists at the University of Basel and ETH Zurich created and verified genuine multipartite entanglement among approximately 14.6 million ultracold atoms in a Bose-Einstein condensate — vastly exceeding earlier records that involved dozens or a few hundred individually addressable qubits, though the entanglement here was verified statistically rather than particle-by-particle.
The largest number of individual particles (atoms or photons) confirmed to be in a single genuinely multipartite entangled quantum state, verified by an entanglement witness or full state tomography where feasible.
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Current frontiers derived from accepted Claims.
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The frontier as it changed over time.
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1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-LARGEST-QUANTUM-ENTANGLEMENT-PARTICLE-COUNT
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Limits Registry. LR-LARGEST-QUANTUM-ENTANGLEMENT-PARTICLE-COUNT. Largest number of particles entangled in a single quantum state. 2026.