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PASER schmazer

You know what a laser is of course. The term stands for Light Amplification by Stimulated Emmission of Radiation. You may not know that they were based on principles developed with the maser (Microwave Amplification by Stimulated Emmission of Radiation), and have led to the saser(a sound laser). Now there's the paser, a particle version of the laser.

A paper in this week's Physical Review Letters describes the first paser. You can read more about it on the American Institute of Physics web page Physics News Update.

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