Implications of simultaneous requirements for low-noise exchange gates in double quantum dots

Erik Nielsen; Ralph W. Young; Richard P. Muller; M. S. Carroll

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Implications of simultaneous requirements for low-noise exchange gates in double quantum dots

机译：双量子点中低噪声交换门同时要求的含义

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Achieving low-error, exchange-interaction operations in quantum dots for quantum computing imposes simultaneous requirements on the exchange energy's dependence on applied voltages. A double quantum dot qubit, approximated with a quadratic potential, is solved using a full configuration interaction method. This method is more accurate than Heitler-London and Hund-Mulliken approaches and captures new and significant qualitative behavior. We show that multiple regimes can be found in which the exchange energy's dependence on the bias voltage between the dots is compatible with current quantum error correction codes and state-of-the-art electronics. Identifying such regimes may prove valuable for the construction and operation of quantum gates that are robust to charge fluctuations, particularly in the case of dynamically corrected gates.

机译：为了进行量子计算而在量子点中实现低误差的交换相互作用操作，对交换能量对施加电压的依赖性提出了同时要求。使用完全构型相互作用方法求解具有二次电势的双量子点量子位。该方法比Heitler-London和Hund-Mulliken方法更准确，并且捕获了新的重要的定性行为。我们表明，可以发现多种机制，其中交换能量对点之间偏置电压的依赖性与当前的量子误差校正码和最新的电子技术兼容。识别出这种机制对于证明对电荷波动具有鲁棒性的量子门的构造和操作可能是有价值的，特别是在动态校正的门的情况下。

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来源
《Physical review》 |2010年第7期|p.075319.1-075319.15|共15页
作者
Erik Nielsen; Ralph W. Young; Richard P. Muller; M. S. Carroll;
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作者单位

Sandia National Laboratories, Albuquerque, New Mexico 87185, USA;

rnSandia National Laboratories, Albuquerque, New Mexico 87185, USA;

rnSandia National Laboratories, Albuquerque, New Mexico 87185, USA;

rnSandia National Laboratories, Albuquerque, New Mexico 87185, USA;

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正文语种 eng
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关键词
quantum dots; quantum computation;

机译：量子点;量子计算;

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机译：低噪声交换门同时要求的含义在双量子点

Implications of simultaneous requirements for low-noise exchange gates in double quantum dots

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