Quantum Control of Polar Molecules for Quantum Information and Quantum Computing

摘要：量子计算机有望彻底改变我们进行计算和解决复杂问题的能力。然而，量子计算机很难制造。目前尚不清楚哪种量子系统最终将用于实现“可扩展的”量子计算机。量子计算机，它需要在大量的量子比特（量子位）上运行，以超越经典计算机。本研究开发了一种利用量子相干控制产生和操纵大量冷极性分子的新技术。这种极性分子有许多吸引人的特性，可以用作量子位。研究人员使用全光学方法来实现对许多极性分子的平行但局部和单独的控制。这项工作可以为可扩展量子计算带来新的方法。研究生和本科生将组成跨学科团队参与这项研究，并在光学与光子学，原子与分子物理学和量子信息科学的前沿学习。基于冷极性分子在量子信息处理和计算中的潜在应用，本研究开发了一种利用量子相干控制来产生和操纵冷极性分子的新技术。研究人员结合了现代分子物理学中两种强大的技术，光关联和相相干控制，探索极性分子量子控制的新方法，使用基于光学的方法来实现对极性分子密度和方向的局部但大规模并行的个体控制。这项工作可能会导致可扩展量子信息处理和计算的新协议和方案的发展。

Quantum Control of Polar Molecules for Quantum Information and Quantum ComputingAbstract:Quantum computers promise to revolutionize our ability to perform computation and solve complicated problems. However, quantum computers are difficult to build. It remains unclear what quantum systems will eventually be used for implementation of a ?scalable? quantum computer, which needs to operate on a large number of quantum bits (qubits) in order to outperform classical computers. This research develops a novel technology using quantum coherent control to produce and manipulate a large number of cold polar molecules. Such polar molecules have many appealing features to be used as qubits. The investigators use all-optical methods to achieve parallel yet local and individual control of many polar molecules. This work can lead to new approaches toward scalable quantum computing. Graduate and undergraduate students will participate in this research in an interdisciplinary team and learn at the forefront of optics and photonics, atomic and molecular physics, and quantum information science. This research develops a novel technology using quantum coherent control in the production and manipulation of cold polar molecules, motivated by potential applications of such polar molecules in quantum information processing and computing. The investigators combine two powerful techniques in modern molecular physics, photoassociation and phase coherent control, to explore novel methods of quantum control of polar molecules, using an optically-based approach to achieve local yet massively-parallel individual control of both the density and orientation of polar molecules. This work could lead to the development of new protocols and schemes of scalable quantum information processing and computing.