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Single-parameter nonadiabatic quantized charge pumping.

Kaestner, B*; Kashcheyevs, V*; Amakawa, S*; Blumenthal, M D*; Li, L*; Janssen, T J B M; Hein, G*; Pierz, K*; Weimann, T*; Siegner, U*; Schumacher, H W* (2008) Single-parameter nonadiabatic quantized charge pumping. Phys. Rev. B, 77. 153301

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Controlled charge pumping in an AlGaAs/GaAs gated nanowire by single-parameter modulation is experimentally and theoretically studied. Transfer of integral multiples of the elementary charge per modulation cycle is clearly demonstrated. A simple theoretical model shows that such a quantized current can be generated via loading and unloading of a dynamic quasibound state. It demonstrates that nonadiabatic blockade of unwanted tunnel events can obliterate the requirement of having at least two phase-shifted periodic signals to realize quantized pumping.

Item Type: Article
Subjects: Quantum Phenomena
Quantum Phenomena > Quantum Information Processing and Communication
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4098

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