Abstract
We show that thermalization of the motion of atoms at negative temperature is possible in an optical lattice, for conditions that are feasible in current experiments. We present a method for reversibly inverting the temperature of a trapped gas. Moreover, a negative-temperature ensemble can be cooled (reducing |T|) by evaporation of the lowest-energy particles. This enables the attainment of the Bose-Einstein condensation phase transition at negative temperature.
Original language | Undefined |
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Pages (from-to) | 1-4 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 95 |
Issue number | 040403 |
DOIs | |
Publication status | Published - 2005 |
Keywords
- IR-52986
- METIS-225066