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arXiv 2104.00318cond-mat.mes-hall
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相互作用量子Hall边通道中辐射压缩的抑制

Suppression of the radiation squeezing in interacting quantum Hall edge channels

G. Rebora, D. Ferraro, M. Sassetti

摘要:

本文研究了量子点接触几何中量子霍尔器件所产生的电磁辐射的两个正交分量的量子涨落。特别是,我们把注意力集中在填充因子2的两个边缘通道之间不可避免的电子-电子相互作用所发挥的作用。我们调查的量子特征的发射微波辐射,如压缩,通过研究在有限频率的电流波动,可通过两个过滤器设置后放置的量子点接触。我们比较两种不同的驱动器,分别是余弦和一个训练的洛伦兹脉冲,用于注入系统的激励。在这两种情况下,量子特征由于相互作用而减少,然而洛伦兹驱动仍然以鲁棒的压缩效应为特征,其可以在量子信息上具有重要的应用。

英文摘要:

We study the quantum fluctuations of the two quadratures of the emitted electromagnetic radiation generated by a quantum Hall device in a quantum point contact geometry. In particular, we focus our attention on the role played by the unavoidable electron-electron interactions between the two edge channels at filling factor two. We investigate quantum features of the emitted microwave radiation, such as squeezing, by studying the current fluctuations at finite frequency, accessible through a two-filters set-up placed just after the quantum point contact. We compare two different drives, respectively a cosine and a train of Lorentzian pulses, used for the injection of the excitations into the system. In both cases quantum features are reduced due to the interactions, however the Lorentzian drive is still characterized by a robust squeezing effect which can have important application on 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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