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摘要

Doppler laser cooling of atoms, first achieved about 30 years ago, generates ultracold temperatures (a millikelvin and below), where the motion of particles virtually ceases and physical phenomena can be studied in great detail. Until now, the only route to ultracold molecules, more complex than atoms and relevant to phenomena from quantum information processing to particle physics, was by binding ultracold alkali atoms together as bi-alkali molecules.