Spin Waves And Dielectric Softening Of Polar Molecule Condensates
PHYSICAL REVIEW LETTERS(2014)
摘要
We consider an oblate Bose-Einstein condensate of heteronuclear polar molecules in a weak applied electric field. This system supports a rich quasiparticle spectrum that plays a critical role in determining its bulk dielectric properties. In particular, in sufficiently weak fields the system undergoes a polarization wave rotonization, leading to the development of textured electronic structure and a dielectric instability that is characteristic of the onset of a negative static dielectric function.
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关键词
spin waves,dielectric softening,molecule
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