论文标题
后坐力实验确定了粘弹性流体的本征模
Recoil experiments determine the eigenmodes of viscoelastic fluids
论文作者
论文摘要
我们通过粘弹性流体以恒定的速度剪切后，实验研究了胶体探针颗粒的后坐力动力学。后坐力显示出两个不同的时间尺度，它们与谐波弹簧链接到两个浴室粒子的粒子建立的微观模型非常吻合。该模型产生分析表达式，该表达式重现了所有实验方案，包括颗粒释放前的额外等待时间。值得注意的是，出现了两组时间尺度，对应于模型的互相和非偏置本征。
We experimentally investigate the recoil dynamics of a colloidal probe particle after shearing it with constant velocity through a viscoelastic fluid. The recoil displays two distinct timescales which are in excellent agreement with a microscopic model built on a particle being linked to two bath particles by harmonic springs. This model yields analytical expressions which reproduce all experimental protocols, including additional waiting periods before particle release. Notably, two sets of timescales appear, corresponding to reciprocal and nonreciprocal eigenmodes of the model.
