Optimal control of charge with local gates in quantum-dot lattices |
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Authors: | Yousof?Mardoukhi Email author" target="_blank">Esa?R?s?nenEmail author |
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Institution: | 1.Department of Physics,Tampere University of Technology,Tampere,Finland |
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Abstract: | Semiconductor quantum dots are among the leading candidates for next-generation nanoscale devices due to their tunable size, shape, and low energy consumption. Here we apply quantum optimal control theory to coherently manipulate the single-electron charge distribution in quantum-dot lattices of various sizes. In particular, we show that to control the charge distribution it is sufficient to optimize the gate voltage acting on a single quantum dot in the lattice. We generally find yields around 99% in the picosecond time scale when using realistic models for the quantum-dot lattices on a real-space grid. We analyze and discuss both the limitations of the model regarding the gate parameters as well as the potential of the scheme for applications as quantum-dot cellular automata. |
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