Detection and quantized conductance of neutral atoms near a charged carbon nanotube |
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Authors: | Ristroph Trygve Goodsell Anne Golovchenko J A Hau Lene Vestergaard |
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Affiliation: | Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. |
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Abstract: | We describe a novel single atom detector that uses the high electric field surrounding a charged single-walled carbon nanotube to attract and subsequently field-ionize neutral atoms. A theoretical study of the field-ionization tunneling rates for atomic trajectories in the attractive potential near a nanowire shows that a broadly applicable, high spatial resolution, low-power, neutral-atom detector with nearly 100% efficiency is realizable with present-day technology. Calculations also show that the system can provide the first opportunity to study quantized conductance phenomena when detecting cold neutral atoms with mean velocities less than 15 m/s. |
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