Castaing's instability in a trapped ultra-cold gas

JN Fuchs, O Prevote, Dimitri Gangardt

Research output: Contribution to journalArticle

3 Citations (Scopus)


We consider a trapped ultra-cold gas of (non-condensed) bosons with two internal states (described by a pseudo spin) and study the stability of a longitudinal pseudo spin polarization gradient. For this purpose, we numerically solve a kinetic equation corresponding to a situation close to the experiment at JILA [1]. It shows the presence of Castaing's instability of transverse spin polarization fluctuations at long wavelengths. This phenomenon could be used to create spontaneous transverse spin waves.
Original languageEnglish
Pages (from-to)167-171
Number of pages5
JournalEuropean Physical Journal D
Issue number2
Publication statusPublished - 1 Aug 2003


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