Volume 102, Number 3, May 2013
|Number of page(s)||5|
|Section||Atomic, Molecular and Optical Physics|
|Published online||20 May 2013|
Interaction of atomic quantum gases with a single carbon nanotube
1 Physik Department, Technische Universität München - D-85747 Garching, Germany, EU
2 Institut für Theoretische Physik, Universität Regensburg - D-93040 Regensburg, Germany, EU
3 Faculty of Physics, Universität Duisburg- Essen - D-47045 Duisburg, Germany, EU
4 Departamento de Física, Universidad del Valle - Cali, Colombia
Received: 16 January 2013
Accepted: 25 April 2013
We study inelastic processes in the hybrid quantum system constituted by a carbon nanotube (CNT) in contact with an ultracold quantum gas, such as a cloud of thermal atoms or a Bose-Einstein condensate (BEC). We present a parameter-free ab initio approach for the loss rate based on the underlying scattering process, considering the two-dimensional character of the system as well as the exact Casimir-Polder potential. The predicted loss rates are in perfect agreement with recent experimental results, obtained both for a thermal cloud of rubidium atoms and for a BEC. For the trap loss of a thermal cloud, we find that retardation effects become important and contribute significantly, which emphasises the crucial role of the exact interaction potential.
PACS: 34.50.-s – Scattering of atoms and molecules / 78.67.Ch – Nanotubes / 67.85.-d – Ultracold gases, trapped gases
© EPLA, 2013
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