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bznm
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Homework Statement
I have to study laser cooling. I'm actually trying to understand the Doppler limit on temperature.
On the net I have found "at a certain point the cooling mechanism is foiled by heating due to the random absorption and reemission of photons. (http://hyperphysics.phy-astr.gsu.edu/hbase/optmod/lascool.html)" (A similar sentence is in Phillips' Paper "Laser cooling and trapping of neutral atoms")
I can't understand in which way emission can heat the atom... Can you explain me? A lot of thanks