标题： 量子随机共振在单光子发射器中 显示英文标题

标题： Quantum stochastic resonance in a single-photon emitter

摘要： 随机共振是一种现象，其中波动增强了原本微弱的信号。它已在古气候学、生物学、医学和物理学中的许多不同系统中被发现。由于热噪声而产生的经典随机共振最近已实验扩展到量子领域，在该领域中，单个量子事件的基本随机性提供了噪声源。在这里，我们展示了在通过隧道与电子库耦合的自组装量子点的周期驱动单光子发射器的单电子隧穿动力学中量子随机共振。这种高度可控的量子发射器是未来量子信息技术应用的有前景的候选者。我们通过共振光学激发来监测电荷动力学，并借助隧穿事件的全计数统计（以Fano因子表示）识别量子随机共振，并将统计评估扩展到矩量级累积量以更深入地理解这一深远的现象。 显示英文摘要

摘要： Stochastic resonance is a phenomenon in which fluctuations enhance an otherwise weak signal. It has been found in many different systems in paleoclimatology, biology, medicine, and physics. The classical stochastic resonance due to thermal noise has recently been experimentally extended to the quantum regime, where the fundamental randomness of individual quantum events provides the noise source. Here, we demonstrate quantum stochastic resonance in the single-electron tunneling dynamics of a periodically driven single-photon emitter, consisting of a self-assembled quantum dot that is tunnel-coupled to an electron reservoir. Such highly-controllable quantum emitters are promising candidates for future applications in quantum information technologies. We monitor the charge dynamics by resonant optical excitation and identify quantum stochastic resonance with the help of full counting statistics of tunneling events in terms of the Fano factor and extend the statistical evaluation to factorial cumulants to gain a deeper understanding of this far-reaching phenomenon.