Quantum interference electronic switch |
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| Affiliation: | 1. School of Physics and Technology, Wuhan University, Wuhan 430072, China;2. State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;3. School of Science, Hubei University of Technology, Wuhan 430068, China;4. Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China;5. Department of Applied Physics,Zhejiang Sci-Tech University, Hangzhou 310018, China;6. Institute for Quantum Computing, University of Waterloo, Ontario N2L 3G1, Canada;7. School of Cyber Security and computer, Hebei University, Baoding 071002, China |
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| Abstract: | A novel planar electron waveguide coupler is proposed as an electronic switch. The structure consists of two quantum wires interconnected by a dual branch coupling scheme which is assumed to be controlled by an electrostatic potential. Switching is provided by tuning the phase relations between the different scattered waves by the two coupling branch lines. Assuming ballistic transport, the analysis is conducted by solving the time independent two-dimensional Schrödinger equation in order to derive the conductance characteristics. At a resonant energy of 25 meV and for a waveguide width of 27.4 nm, over 90% of the electron wave has been transferred with a half picosecond time response. |
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