Index OMC_final - Harvard University
Index OMC_final - Harvard University
Index OMC_final - Harvard University
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OPTICAL TRAPPING AND COOLING OF GLASS MICROSPHERES<br />
Mark Raizen<br />
<strong>University</strong> of Texas<br />
In this talk I will report on our experiments with glass microspheres trapped in optical tweezers in<br />
air and in vacuum. In the air experiments, we have measured for the first time the instantaneous<br />
velocity of a Brownian particle, following a prediction by Albert Einstein from 1907. In our<br />
experiments with a trapped microsphere in vacuum, we have cooled the center-of-mass motion to<br />
1.5 mK, on the way towards ground-state cooling.<br />
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