论文标题
来自腔内不断驱动的量子发射极的不同类型的光子纠缠
Different types of photon entanglement from a constantly driven quantum emitter inside a cavity
论文作者
论文摘要
贝尔状态是最突出的最大纠结光子状态。在典型的四级发射极（例如半导体量子点）中，光子状态仅表现出一种类型的贝尔状态纠缠。通过在发射极系统中添加外部驾驶，也可以在不改变两极分子的情况下达到其他类型的贝尔状态纠缠。在本文中，我们在哪些条件下显示出不同类型的纠缠发生，并提供分析方程来解释这些发现。我们进一步确定了特殊点，即同意是纠缠程度的衡量量，降至零，而两光子状态之间的相干性保持强大。这项工作的结果铺平了对实用设备中纠缠类型的受控操纵的方式。
Bell states are the most prominent maximally entangled photon states. In a typical four-level emitter, like a semiconductor quantum dot, the photon states exhibit only one type of Bell state entanglement. By adding an external driving to the emitter system, also other types of Bell state entanglement are reachable without changing the polarization basis. In this paper, we show under which conditions the different types of entanglement occur and give analytical equations to explain these findings. We further identify special points, where the concurrence, being a measure for the degree of entanglement, drops to zero, while the coherences between the two-photon states stay strong. Results of this work pave the way to achieve a controlled manipulation of the entanglement type in practical devices.
