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Dynamic structure factor and drag force in a one-dimensional strongly-interacting Bose gas at finite temperature

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 نشر من قبل Guillaume Lang
 تاريخ النشر 2015
  مجال البحث فيزياء
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We study the effect of thermal and quantum fluctuations on the dynamical response of a one-dimensional strongly-interacting Bose gas in a tight atomic waveguide. We combine the Luttinger liquid theory at arbitrary interactions and the exact Bose-Fermi mapping in the Tonks-Girardeau-impenetrable-boson limit to obtain the dynamic structure factor of the strongly-interacting fluid at finite temperature. Then, we determine the drag force felt by a potential barrier moving along the fluid in the experimentally realistic situation of finite barrier width and temperature.



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