Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 33: Micromechanical oscillators

Q 33.2: Vortrag

Donnerstag, 20. März 2014, 10:45–11:00, DO24 1.101

Immersing carbon nanotubes in cold atomic gases — •Polina Mironova¹, Carsten Th. Weiss^2,3, and Reinhold Walser¹ — ¹Technische Universität Darmstadt, Darmstadt, Deutschland — ²Universität Ulm, Ulm, Deutschland — ³Eberhard-Karls-Universität Tübingen, Tübingen, Deutschland

We investigate the sympathetic relaxation of a free-standing, vibrating carbon nanotube that is mounted on an atom-chip and is immersed in a cloud of ultra-cold atoms. Gas atoms colliding with the nanotube excite phonons via a Casimir-Polder potential. We use Fermi's Golden Rule to estimate the relaxation rate for the relevant experimental parameters. Based on currently available experimental data, we identify the relaxation rates as a function of atom density and temperature that are required for sympathetic ground state cooling of carbon nanotubes.