Abstract
Motivated by the experimental search for Bose condensation of quasiparticles in semiconductors, the response functions of a weakly interacting Bose gas, with isotropic but nonquadratic dispersion, are considered. Nonquadratic dispersion modifies the definition of particle current, and leads to modified sum rules for the current-current response function. The effect of these modifications on the Berezhinski-Kosterlitz-Thouless transition is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 155325 |
| Number of pages | 5 |
| Journal | Physical Review. B, Condensed matter and materials physics |
| Volume | 74 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - Oct 2006 |
Keywords
- SEMICONDUCTOR MICROCAVITY
- EINSTEIN CONDENSATION
- POLARITON LASER
- SYSTEMS
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