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arXiv 1602.03029cond-mat.mes-hall
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用非绝热抽运谱读出弛豫速率

Readout of relaxation rates by nonadiabatic pumping spectroscopy

Roman-Pascal Riwar, Benoît Roche, Xavier Jehl, Janine Splettstoesser

摘要:

我们提出了非绝热电荷泵作为一种方法来访问不同的电荷弛豫率以及双量子点设置中的激发轨道态的弛豫率,基于极端尺寸有限的量子点和掺杂剂系统。速率是以与平台区良好分离的方式获得的,当比较反向驱动循环的稳态电流时发生。这产生独立于任何拟合参数的可靠读数。重要的是,非绝热泵浦光谱基本上利用了与这些设备的操作通常采用的相同的驱动方案。我们提供了一个详细的分析读出方案的工作原理以及可能的错误,从而证明其广泛的适用性。弛豫速率的精确知识与时间相关操作设备的实现高度相关,例如用于计量的电子泵或量子信息中的量子位。

英文摘要:

We put forward nonadiabatic charge pumping as a method for accessing the different charge relaxation rates as well as the relaxation rates of excited orbital states in double-quantum-dot setups, based on extremely size-limited quantum dots and dopant systems. The rates are obtained in a well-separated manner from plateaus, occurring when comparing the steady-state current for reversed driving cycles. This yields a reliable readout independent of any fitting parameters. Importantly, the nonadiabatic pumping spectroscopy essentially exploits the same driving scheme as the operation of these devices generally employs. We provide a detailed analysis of the working principle of the readout scheme as well as of possible errors, thereby demonstrating its broad applicability. The precise knowledge of relaxation rates is highly relevant for the implementation of time-dependently operated devices, such as electron pumps for metrology or qubits in quantum information.

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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