Physicists have made yet another breakthrough in the field of Bose-Einstein condensation. Wolfgang Ketterle and colleagues at the Massachusetts Institute of Technology have succeeded in cooling a Bose condensate of sodium atoms down to below 500 pK. This is six times lower than the previous temperature record for Bose condensates. These ultracold samples could be important for spectroscopy, metrology and atomic optics applications (A Leanhardt et al. 2003 Science 301 1513).
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