论文标题
极化培养基：玻色子之间的费米介导的相互作用
Polarizing the Medium: Fermion-Mediated Interactions between Bosons
论文作者
论文摘要
我们考虑玻色子和偏光费的均匀混合物。我们发现，玻色子之间的远距离和有吸引力的费米介导的相互作用对玻色子的性质产生了巨大影响。我们构建了由玻色子弗氏质量比和玻色子 - 弗里术散射参数所跨的相图。它由稳定的混合区域和不稳定区域的区域组成。在稳定的混合阶段，集体的长波长激发可以用无限的寿命来表现良好，或者在终生中遭受Landau阻尼的寿命有限。我们检查了诱导相互作用对弱相互作用玻色子性能的影响。事实证明，诱导的相互作用不仅可以增强玻色子之间对塌陷的排斥，而且还通过抑制量子耗竭来增强超流体状态的稳定性。
We consider a homogeneous mixture of bosons and polarized fermions. We find that long-range and attractive fermion-mediated interactions between bosons have dramatic effects on the properties of the bosons. We construct the phase diagram spanned by boson-fermion mass ratio and boson-fermion scattering parameter. It consists of stable region of mixing and unstable region toward phase separation. In stable mixing phase, the collective long-wavelength excitations can either be well-behaved with infinite lifetime or be finite in lifetime suffered from the Landau damping. We examine the effects of the induced interaction on the properties of weakly interacting bosons. It turns out that the induced interaction not only enhances the repulsion between the bosons against collapse but also enhances the stability of the superfluid state by suppressing quantum depletion.
