Collaborative Research: DMREF: Designing Coherence and Entanglement in Perovskite Quantum Dot Assemblies

在DMREF项目和化学系的支持下，普渡大学的黄立白、乔纳森·胡德和克里斯蒂娜·李、麻省理工学院的曹建树和南加州大学的奥列格·普雷兹多正在领导一个项目，设计一种新型量子材料——一种能够从被称为量子点的微小半导体粒子中实现“波状”信息和能量传输的材料。由卤化铅钙钛矿（一种半导体材料）衍生的量子点在吸收和发射光方面表现出非凡的效率。主要目标是了解这些量子点如何协同工作，它们如何通信，以及如何保护这种通信不受干扰，这种现象被称为退相干。最终目标是为创造能够以独特、高效和波状方式传输信息和能量的新材料铺平道路。这样的突破可能会彻底改变太阳能电池技术和量子通信。作为项目的一部分，该团队还致力于与广泛的受众分享他们的知识。该项目还将通过为下一代科学家和工程师提供独特的培训和教育机会，为更多样化的科学界做出贡献，特别注重增加代表性不足群体的参与，并作为一个合作的三机构团队，探索量子化学，物理和材料科学的令人兴奋的联系。DMREF项目旨在通过探索胶体卤化铅钙钛矿量子点（QDs）之间相干和纠缠相互作用产生的集体特性，设计一个新的量子材料平台。该团队将利用他们在超快显微镜、量子光学、激发态计算、量子动力学理论和量子点合成方面的专业知识，回答有关这些集体状态如何出现以及如何在固态环境中维持的基本问题。该项目预计将通过共同努力来创造、表征和建模量子态，这些量子态可能会从量子点的集体相互作用中出现，从而实现知识的进步。为了建立强大的相干性和纠缠性，该团队将控制超晶格中量子点之间的耦合，并测量空间和时间中的相干程度。此外，这些量子点在光学腔内的战略性放置预计是实现相干和纠缠的关键一步。这些见解将有助于探索钙钛矿结构、超晶格和光子结构的超大设计空间。因此，这里的研究将奠定一个重要的基础，从长远来看，有可能为基于胶体量子点的量子材料的突破性进展做出贡献。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

With the support of the DMREF Program and the Division of Chemistry, Libai Huang, Jonathan Hood and Christina Li at Purdue University, Jianshu Cao at Massachusetts Institute of Technology, and Oleg Prezhdo at the University of Southern California are leading a project on designing a new class of quantum materials —one that can enable “wave-like” transport of information and energy from tiny semiconductor particles known as quantum dots. Quantum dots derived from lead halide perovskites, a type of semiconductor material, exhibit extraordinary efficiency in absorbing and emitting light. The principal goal is to understand how these quantum dots can work together, how they communicate, and how to shield this communication from disruptions, a phenomenon known as decoherence. The ultimate aim is to pave the way for the creation of new materials capable of transmitting information and energy in a unique, efficient, and wave-like manner. Such a breakthrough could revolutionize solar cell technology and quantum communications. As part of the project, the team is also committed to sharing their knowledge with a broad audience. This project will also contribute to a more diverse scientific community by offering unique training and educational opportunities for the next generation of scientists and engineers, with a specific focus on increasing participation from underrepresented groups and, as a collaborative, three-institution team, exploring this exciting nexus of quantum chemistry, physics and materials science.The DMREF project aims to design a new quantum materials platform by exploring the collective properties that arise from coherent and entangled interactions between colloidal lead halide perovskite quantum dots (QDs). The team will use their expertise in ultrafast microscopy, quantum optics, excited-state calculations, quantum dynamics theory, and QD synthesis to answer fundamental questions about how these collective states emerge and how they can be sustained in a solid-state environment. This project is expected to deliver knowledge advancements through a concerted effort to create, characterize, and model the quantum states that would potentially emerge from the collective interactions of QDs. With the goal of establishing robust coherence and entanglement, the team will control coupling across QDs in superlattices and measure the extent of coherence in space and time. Additionally, the strategic placement of these QDs within optical cavities is anticipated to be a critical step towards achieving coherence and entanglement. These insights will enable exploration of the extremely large design space available for perovskite structures, superlattices, and photonic structures. As such, the studies here will lay an important foundation and, in the longer term, has the potential to contribute to groundbreaking advances in quantum materials based on colloidal QDs.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.