Tuesday, July 9, 2013

1307.2096 (C. T. Weiß et al.)

Immersing carbon nano-tubes in cold atomic gases    [PDF]

C. T. Weiß, P. V. Mironova, J. Fortágh, W. P. Schleich, R. Walser
We investigate the sympathetic relaxation of a free-standing, vibrating carbon nano-tube that is mounted on an atom chip and is immersed in a cloud of ultra-cold atoms. Gas atoms colliding with the nano-tube excite phonons via a Casimir-Polder potential. We use Fermi's Golden Rule to estimate the relaxation rates for relevant experimental parameters and develop a fully dynamic theory of relaxation for the multi-mode phononic field embedded in a thermal atomic reservoir. 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 12nano-tubes.
View original: http://arxiv.org/abs/1307.2096

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