FRG: Center for Quantum Information Physics

*非技术摘要*这笔赠款将支持耶鲁大学量子信息物理中心(CQuIP)。CQuIP的研究正在探索有望用于大规模量子信息处理的系统。量子效应的使用实现了新的能力，如无需密钥的安全通信；某些计算任务的指数加速；等等。然而，这些优势只有通过量子比特系统(量子计算中的对应于经典计算中的信息比特)才能完全实现，这些系统比现在更好地控制，并在更大的网络中相互连接。这个项目将解决这两个问题。实验研究将推动在几个系统中控制量子比特的技术水平，包括超导电路；被激光或芯片上的微电极捕获的单个分子；微机械悬臂；以及使用磁共振方法操纵的原子核。这项工作的一个关键目标是开发改进的方法，利用光子(一种光粒子)将这些系统相互连接起来，并与外部世界连接起来。微波是一种以低得多的频率振荡的光，这个项目将同时使用微波和光学光子。作为对实验工作的支持，理论研究将探索改进量子比特控制和联网的新想法。CQuIP努力的一个主要部分是通过让年轻研究人员(博士生、博士后研究员和本科生)直接参与研究来教育他们。通过参与这项研究，他们将为未来在学术界、工业界或政府实验室的职业生涯做准备。该项目得到了材料研究部和物理部的支持。*技术摘要*这笔赠款将支持耶鲁大学量子信息物理中心(CQuIP)。CQuIP的研究正在从理论和实验上探索几个有望用于大规模量子信息处理的系统的物理。量子效应的使用实现了新的能力，如无需密钥的安全通信；某些计算任务的指数加速；等等。然而，这些优势只有通过量子比特系统才能完全实现，这些系统比现在可能的更好地控制，并在更大的网络中相互连接。这个项目将解决这两个问题。基于超导电路和捕获的极性分子的量子比特的进一步发展将提高量子信息存储和处理的保真度。复杂量子态的操纵和转移将使用光学和微波光子，并耦合到电气和/或微机械设备来演示。我们将使用耦合核自旋来探索控制大型量子网络的局限性。最后，将设计方案，使用极性分子系统作为量子比特，以实现用于信息存储的复杂多体拓扑态的最新想法。CQuIP努力的一个主要部分是通过让年轻研究人员(博士生、博士后研究员和本科生)直接参与研究来教育他们。通过参与这项研究，他们将为未来在学术界、工业界或政府实验室的职业生涯做准备。该项目得到了材料研究部和物理部的支持。

****NON-TECHNICAL ABSTRACT****This grant will support the Center for Quantum Information Physics (CQuIP) at Yale University. Research in CQuIP is exploring systems with promise for use in large-scale quantum information processing. The use of quantum effects enables new capabilities such as secure communication without cryptographic keys; exponential speedup of certain computational tasks; etc. However, these advantages can only be fully realized with systems of quantum bits (the counterpart in quantum computing to the bit of information in classical computing) that are much better controlled, and interconnected in much larger networks, than is now possible. This project will address both issues. Experimental studies will advance the state of the art in controlling quantum bits in several systems, including superconducting circuits; individual molecules trapped by lasers or by microelectrodes on a chip; micromechanical cantilevers; and atomic nuclei manipulated using magnetic resonance methods. A key goal of this work is development of improved methods to interconnect such systems to each other, and to the outside world using photons (a particle of light). Microwaves are a form of light that oscillates at a much lower frequency and this project will involve the use of both microwave and optical photons. In support of the experimental work, theoretical research will investigate new ideas for improving both the control and the networking of quantum bits. A major part of the CQuIP effort is the education of young researchers (Ph.D. students, postdoctoral fellows, and undergraduates) by involving them directly in the research. Through participation in this research they will be propeared for future careers in academia, industry, or government laboratories. This project receives support from the Division of Materials Research and the Division of Physics.****TECHNICAL ABSTRACT****This grant will support the Center for Quantum Information Physics (CQuIP) at Yale University. Research in CQuIP is exploring, both theoretically and experimentally, the physics of several systems with promise for use in large-scale quantum information processing. The use of quantum effects enables new capabilities such as secure communication without cryptographic keys; exponential speedup of certain computational tasks; etc. However, these advantages can only be fully realized with systems of quantum bits that are much better controlled, and interconnected in much larger networks, than is now possible. This project will address both issues. Further development of quantum bits based on superconducting circuits and trapped polar molecules will advance the fidelity of quantum information storage and processing. The manipulation and transfer of complex quantum states will be demonstrated using both optical and microwave photons, coupled to electrical and/or micromechanical devices. Limitations to control of large quantum networks will be explored using coupled nuclear spins. Finally, schemes will be devised, using the system of polar molecules as qubits, to implement recent ideas for complex many-body topological states for information storage. A major part of the CQuIP effort is the education of young researchers (Ph.D. students, postdoctoral fellows, and undergraduates) by involving them directly in the research. Through participation in this research they will be propeared for future careers in academia, industry, or government laboratories. This project receives support from the Division of Materials Research and the Division of Physics.