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arXiv 0711.0210cond-mat.mes-hallcond-mat.supr-conquant-ph
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作为量子化电流源的库珀对泵

The Cooper Pair Pump as a Quantized Current Source

Raphaël Leone, Laurent Lévy, Philippe Lafarge

摘要:

基于三维参数空间$\mathbb{P}$上哈密顿基态的拓扑性质,提出了一种新的相位极化库珀对泵(CPP)中的电荷量子化方法。使用覆盖环面的表面的$\mathbb{P}$中的一组路径来量化电荷,并且电荷是该表面的整数Chern指数$c_1$的倍数。这种量子化是渐近的,但是随着路径频率的增加,泵浦电荷迅速收敛到量子化值。电流的拓扑性质使CPP实现成为一个很好的候选标准。

英文摘要:

A new charge quantization in a phase-polarized Cooper Pair Pump (CPP) is proposed, based on the topological properties of its Hamiltonian ground state over a three-dimensional parameter space $\mathbb{P}$. The charge is quantized using a set of path in $\mathbb{P}$ covering the surface of a torus, and is a multiple of the integer Chern index $c_1$ of this surface. This quantization is asymptotic but the pumped charge converges rapidly to the quantized value with the increase in the path frequency. The topological nature of the current makes this CPP implementation an excellent candidate for a metrological current standard.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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