Quantum Information Processing with Two-Dimensional Atomic Arrays

这项ITR提案支持一项为期五年的重点协调工作，旨在利用激光束在二维晶格上捕获的可单独寻址的中性Rb原子，创建一个32量子位的量子处理器。它建立在最近非常有前途的，但实验上尚未证明的，关于利用激光和高激发态操纵原子之间量子耦合的理论概念之上。该团队将使用由全息光学元件的光束定义的可重构原子晶格。站点到站点的间距为7微米，每个量子位都可以单独寻址。量子比特由超精细基态能级表示，任意态矢量旋转使用激光脉冲进行。一个完整的逻辑原语集合所需要的条件双量子位相互作用是通过激发到一个高原子里德伯能级来实现的。实现这些概念的一个新颖方面是利用偶极子封锁来允许大规模的亚泊松装载量子位位。该项目由威斯康星大学麦迪逊分校的物理系和计算机科学系以及科罗拉多大学博尔德分校的电气工程系合作完成。

This ITR proposal supports a focused and coordinated effort over five years directed toward creating a 32 qubit quantum processor using individually addressable neutral Rb atoms trapped by laser beams on a two-dimensional lattice. It builds on recent very promising, but experimentally undemonstrated, theoretical concepts about manipulating the quantum coupling between atoms using lasers and highly excited atomic states. The team will use a reconfigurable atomic lattice defined by the beams from holographic optical elements. With a site to site spacing of 7 microns each qubit is individually addressable. Qubits are represented by hyperfine ground state levels and arbitrary state vector rotations are performed using laser pulses. The conditional two-qubit interaction that is needed for a complete set of logical primitives is achieved by exciting to a high lying atomic Rydberg level. A novel aspect of the implementation of these concepts is the exploitation of the dipole-blockade to allow massively sub-Poissonian loading of the qubit sites. The project is a collaboration between the Physics and Computer Sciences departments at The University of Wisconsin-Madison and the Electrical Engineering department at The University of Colorado Boulder.