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arXiv 1607.08229cond-mat.mes-hallquant-ph
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双量子点Floquet增益介质

Double Quantum Dot Floquet Gain Medium

J. Stehlik, Y. -Y. Liu, C. Eichler, T. R. Hartke, X. Mi, M. J. Gullans, J. M. Taylor, J. R. Petta

摘要:

用光强驱动二能级量子系统导致由光子能量分离的Floquet态的阶梯。纳米级量子器件允许在强驱动条件下研究受限电子、声子和光子的相互作用。在这里,我们表明,在一个周期性驱动的DQD功能的单电子作为一个“Floquet增益介质”,人口不平衡的DQD Floquet准能级导致腔响应中的增益和损耗功能的一个复杂的模式。我们进一步测量了一个大的腔内光子数n_c的情况下,腔驱动场,由于平衡的Floquet图片。我们的设备在没有直流电流的情况下工作--同一个电子被反复驱动到激发态以产生粒子数反转。这些结果为进一步研究非经典光和受驱动量子系统的热化铺平了道路。

英文摘要:

Strongly driving a two-level quantum system with light leads to a ladder of Floquet states separated by the photon energy. Nanoscale quantum devices allow the interplay of confined electrons, phonons, and photons to be studied under strong driving conditions. Here we show that a single electron in a periodically driven DQD functions as a "Floquet gain medium," where population imbalances in the DQD Floquet quasi-energy levels lead to an intricate pattern of gain and loss features in the cavity response. We further measure a large intra-cavity photon number n_c in the absence of a cavity drive field, due to equilibration in the Floquet picture. Our device operates in the absence of a dc current -- one and the same electron is repeatedly driven to the excited state to generate population inversion. These results pave the way to future studies of non-classical light and thermalization of driven quantum systems.

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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