OP: A High-Throughput Quantum Photonic Source

摘要标题：一种产生非经典光的高通量量子光子源摘要：非技术性说明：激光器的发明是人类历史上最重要的科技成就之一。激光已经融入我们的日常生活：在其众多应用中，激光用于光盘驱动器，激光打印机和条形码扫描仪;光纤和自由空间光通信;激光手术和皮肤治疗;切割和焊接材料;用于标记目标和测量距离和速度的军事和执法设备;以及娱乐中的激光照明显示器。 激光器产生明亮、相干和紧密聚焦的光束，这些光束由大量光子（光的单个成分）组成。当使用光电探测器测量激光束中光子的到达时间时，光子随机到达。研究人员发现，如果光子的到达时间可以被编排，这些光子可能在量子计算和通信中具有使用传统激光器无法实现的新应用。由这些协调的光子组成的光束被称为非经典光。科学家已经证明了非经典光的存在。然而，迄今为止，还没有有效的方法来产生明亮的非经典光。主要的障碍是，虽然科学家们可以协调少数光子，但要协调大量的光子是非常具有挑战性的。该项目旨在研究一种量子光源，以产生明亮的非经典光。具体来说，我们将设计一个量子光源，并开发一个计算框架来控制和操纵光源产生的光子。一旦完成，该项目将使一种新型的量子光源成为可能，量子光源的输出光将由大量协调的光子组成，从而可以控制它们到达光电探测器的时间。这种新的量子光源对于量子信息科学的实际应用将是重要的。控制光的量子态的能力对于现代社会至关重要。该项目的成功将标志着量子光学信息处理领域的重大突破，该领域已经广泛影响了现代技术和人类生活。技术描述：为了满足下一代科学技术应用的广泛需求，必须在芯片上产生大通量纠缠量子光子态（反聚束或聚束纠缠光子）。其中包括量子光学信息处理，如量子计算和量子密钥分配，以及量子（或幽灵）成像。在聚束状态下，光子总是一起到达光电探测器;而在反聚束状态下，光子永远不会一起到达。利用腔量子电动力学（QED）系统是一种很有前途的固态量子光子态设计方法，该系统依赖于Jaynes-Cummings相互作用的非谐性。PI已经表明，目前在实验中采用的几何结构-一个单一的Jaynes-Cummings（JC）组件夹在两个波导之间-在高转换效率（从独立光子到纠缠光子）和量子态的质量（纠缠度）之间具有基本的权衡，并且对耗散敏感。此外，单个JC组分的短寿命严重限制了量子光子态的有效产生。期望具有高通量量子光源;然而，直接按比例增加腔QED组件的数量将不起作用，因为从不同腔QED组件产生的光子将在输出处彼此干涉以洗掉状态内相关性。该提案的目标是计算研究高通量量子光子源，产生高质量的纠缠量子光子态，以推动量子光子态的产生远远超出最先进的水平。

Abstract title: A high-throughput quantum photonic source for generating non-classical lightAbstract:Non-technical description:The invention of lasers is one of the most important scientific and technological achievements in the history. The laser is already integrated into our daily life: Among their many applications, lasers are used in optical disk drives, laser printers, and barcode scanners; fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment. The laser produces bright, coherent, and tightly-focused light beams which consist of lots of photons (individual constituents of light). When measuring the arrival times of the photons in a laser beam using a photo-dector, the photons arrive randomly. Researchers have discovered that if the arrival times of photons can be orchestrated, these photons could have novel applications in quantum computing and communications that are not possible by using conventional lasers. A light beam that consists of these orchestrated photons is called non-classical light. Scientists have demonstrated the existence of the non-classical light. Nonetheless, to date there exist no efficient methods to produce bright non-classical light. The major hurdle is that although the scientists can coordinate a handful photons, it is very challenging to coordinate a large number of photons in a batch.The project aims to research a quantum light source for generating bright non-classical light. Specifically, we will design a quantum light source, and develop a computational framework to control and to manipulate the photons generated by the light source. Once completed, this project will make possible a new type of quantum light sources such that the output light of the quantum light sources will consist of a large number of coordinated photons so that their arrival times at the photo-detector can be controlled. Such a new quantum light source will be important for practical applications in quantum information science. The capabilities for controlling quantum state of light are of paramount importance for modern society. The success of the project will represent important breakthroughs in quantum optical information processing, a field that has already broadly impacted modern technology and human life.Technical description:The capability of on-chip generation of a large flux of entangled quantum photonic states (antibunched or bunched entangled photons) is necessary to meet the growing demands of a broad range of next-generation scientific and technological applications. Among these are quantum optical information processing, such as quantum computing and quantum key distribution, and quantum (or ghost) imaging. In bunched states, the photons always arrive together at the photo-detector; while in the antibunched states, the photons never arrive together. A promising solid-state route to engineer the quantum photonic states is to use the cavity quantum electrodynamics (QED) systems that relies on the anharmonicity of the Jaynes-Cummings interaction. The PI has shown that the geometry currently employed in experiments - a single Jaynes-Cummings (JC) component sandwiched by two waveguides - have a fundamental tradeoff between high converting efficiency (from independent photons to entangled photons) and the quality of the quantum states (degree of entanglement), and is sensitive to dissipation. Furthermore, the short lifetime of a single JC component severely limits the efficient generation of the quantum photonic states. It is desirable to have high-throughput quantum light sources; however, direct scaling up the number of the cavity QED components would not work, as the photons generated from different cavity QED component would intervene with each other at the output to wash out the intra-state correlations. The goal of this proposal is to computationally research high-throughput quantum photonic sources that produce high-quality entangled quantum photonic states to push the generation of the quantum photonic states well beyond the state-of-the-art.