FRG: Center for Quantum Information Physics

****非技术摘要****这笔拨款将用于支持耶鲁大学量子信息物理中心（CQuIP）。CQuIP的研究正在探索有希望用于大规模量子信息处理的系统。量子效应的使用可以实现新的功能，例如无需加密密钥的安全通信；某些计算任务的指数加速；等。然而，这些优势只能通过量子比特系统（量子计算中与经典计算中的信息位相对应的系统）来充分实现，这些系统比现在可能得到更好的控制，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，包括超导电路；被激光或芯片上的微电极捕获的单个分子；微机械悬臂梁;以及用核磁共振的方法操纵原子核。这项工作的一个关键目标是开发改进的方法，使这些系统相互连接，并使用光子（一种光粒子）与外部世界连接。微波是一种以低得多的频率振荡的光的形式，这个项目将涉及微波和光光子的使用。为了支持实验工作，理论研究将探讨改进量子比特的控制和网络的新思路。CQuIP工作的一个主要部分是通过让年轻研究人员（博士生、博士后和本科生）直接参与研究，对他们进行教育。通过参与这项研究，他们将为将来在学术界、工业界或政府实验室的职业生涯做好准备。本项目得到材料研究部和物理部的支持。****技术摘要****本基金将用于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两方面探索几个有望用于大规模量子信息处理的系统的物理特性。量子效应的使用可以实现新的功能，例如无需加密密钥的安全通信；某些计算任务的指数加速；等。然而，这些优势只能通过比现在更好的控制和更大的网络互联的量子比特系统来充分实现。这个项目将解决这两个问题。基于超导电路和捕获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。复杂量子态的操作和转移将使用光学和微波光子，耦合到电气和/或微机械设备来演示。利用核自旋耦合来探讨控制大量子网络的局限性。最后，将设计方案，使用极性分子系统作为量子位，以实现用于信息存储的复杂多体拓扑状态的最新想法。CQuIP工作的一个主要部分是通过让年轻研究人员（博士生、博士后和本科生）直接参与研究，对他们进行教育。通过参与这项研究，他们将为将来在学术界、工业界或政府实验室的职业生涯做好准备。本项目得到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.