Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.49: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG2

A classical linear Boltzmann equation for rotational friction and diffusion — •Lukas Martinetz, Benjamin A. Stickler, and Klaus Hornberger — Fakultät für Physik, Universität Duisburg-Essen

Motivated by recent experiments [1,2,3], we derive the classical linear Boltzmann equation for the ro-translational dynamics of an arbitrarily shaped anisotropic nanoparticle interacting with a dilute gas. It accounts for specular as well as diffuse thermal reflection of the gas atoms at the particle surface. As a limiting case, the Boltzmann equation describes rotational friction and diffusion. By specifying the form of the nanoobject, we derive the friction and diffusion coefficients for spheres, cylinders and cuboids and discuss the equilibration of the orientation state.

[1] Kuhn et al., Cavity-Assisted Manipulation of Freely Rotating Silicon Nanorods in High Vacuum, Nano Lett. 15, 5604 (2015)

[2] Hoang et al., Torsional Optomechanics of a Levitated Nonspherical Nanoparticle, Phys. Rev. Lett. 117, 123604 (2016)

[3] Kuhn et al., Full Rotational Control of Levitated Silicon Nanorods, arXiv:1608.07315 (2016)