Abstract
We explore the analogy between two-component quantum alkali-metal gases and spin-polarized helium systems. Recent experiments in trapped gases are put into the frame of the existing theory for the Castaing instability in transverse channels and the formation of homogeneous precessing domains in spin-polarized systems. Analogous effects have already been observed in spin-polarized ${}^{3}\mathrm{He}$ and ${}^{3}\mathrm{He}{\ensuremath{-}}^{4}\mathrm{He}$ mixture systems. The threshold effect of the confining potential on the instability is analyzed. Additional experimental possibilities for the observation of a transverse instability in a trap are discussed.
Highlights
The remarkable observation of spontaneous spatial separation of states in recent experiments on trapped 87Rb1͔was immediately followed by three, almost simultaneous theoretical explanations2– 4͔
We explore the analogy between two-component quantum alkali-metal gases and spin-polarized helium systems
Recent experiments in trapped gases are put into the frame of the existing theory for the Castaing instability in transverse channels and the formation of homogeneous precessing domains in spin-polarized systems
Summary
Follow this and additional works at: https://digitalcommons.uri.edu/phys_facpubs. Precessing Domains and the Castaing Instability in Confined Alkali-metal Gases. Meyerovich Department of Physics, University of Rhode Island, Kingston, Rhode Island 02881. We explore the analogy between two-component quantum alkali-metal gases and spin-polarized helium systems. Recent experiments in trapped gases are put into the frame of the existing theory for the Castaing instability in transverse channels and the formation of homogeneous precessing domains in spin-polarized systems. Analogous effects have already been observed in spin-polarized 3He and 3He-4He mixture systems. The threshold effect of the confining potential on the instability is analyzed. Additional experimental possibilities for the observation of a transverse instability in a trap are discussed
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