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 |
|---|---|
| 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
Cite this
Mosk, A. (2005). Atomic Gases at Negative Kinetic Temperature. Physical review letters, 95(040403), 1-4. https://doi.org/10.1103/PhysRevLett.95.040403