Report
Anisotropic particles near surfaces: Self-propulsion and friction
| العنوان: | Anisotropic particles near surfaces: Self-propulsion and friction |
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| المؤلفون: | Müller, Boris, Krüger, Matthias |
| المصدر: | Phys. Rev. A 93, 032511 (2016) |
| سنة النشر: | 2015 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Statistical Mechanics |
| الوصف: | We theoretically study the phenomenon of self-propulsion through Casimir forces in thermal non-equilibrium. Using fluctuational electrodynamics, we derive a formula for the self-propulsion force for an arbitrary small object in two scenarios, i) for the object being isolated, and ii) for the object being close to a planar surface. In the latter case, the self-propulsion force (i.e., the force parallel to the surface) increases with decreasing distance, i.e., it couples to the near-field. We numerically calculate the lateral force acting on a hot spheroid near a surface and show that it can be as large as the gravitational force, thus being potentially measurable in fly-by experiments. We close by linking our results to well-known relations of linear response theory in fluctuational electrodynamics: Looking at the friction of the anisotropic object for constant velocity, we identify a correction term that is additional to the typically used approach. Comment: 13 pages, 8 figures (v2: References updated) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevA.93.032511 |
| URL الوصول: | http://arxiv.org/abs/1510.08376 |
| رقم الانضمام: | edsarx.1510.08376 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevA.93.032511 |
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