Quantum Information Processing with Two-Dimensional Atomic Arrays

这项ITR提案支持在五年内集中和协调的努力，旨在利用被二维晶格上的激光捕获的可单独寻址的中性Rb原子来创建32量子位量子处理器。它建立在最近非常有希望但没有实验证明的理论概念的基础上，这些概念是关于使用激光和高激发原子态来操纵原子之间的量子耦合。该团队将使用由全息光学元件的光束定义的可重新配置的原子晶格。由于每个量子比特的站点间间隔为7微米，因此每个量子比特可单独寻址。量子比特由超精细基态能级表示，并使用激光脉冲执行任意状态向量旋转。一套完整的逻辑基元所需的条件两量子位相互作用是通过激发到高位原子里德堡能级来实现的。实现这些概念的一个新方面是利用偶极封锁来允许量子比特位置的大规模亚泊松加载。该项目是威斯康星大学麦迪逊分校的物理和计算机科学系与科罗拉多大学博尔德分校的电气工程系合作完成的。

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.