具有10−4级强度串扰的Ba+量子比特的敏捷单个寻址制导光系统

IF 5.6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Quantum Science and Technology Pub Date : 2023-02-28 DOI:10.1088/2058-9565/ace6cb
A. Binai-Motlagh, Matthew L Day, N. Videnov, Noah Greenberg, C. Senko, R. Islam
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引用次数: 4

摘要

捕获离子是量子信息处理的主要平台之一,在所有竞争硬件中具有最高的栅极和测量保真度。为了实现具有捕获离子的通用量子计算机,需要对每个量子比特的状态进行独立并行的控制。通过受激拉曼跃迁操纵离子链中的单个量子比特状态通常需要光聚焦在单个离子上。在这篇论文中,我们提出了一种新颖的超精细Ba+量子比特的导光单个寻址系统。该系统利用激光写入波导技术,利用Ba+的原子结构,允许使用可见光来驱动拉曼跃迁。这种波导定义了光的空间模式,抑制了在自由空间光学装置中积累的像差。结果表明,在没有任何主动像差补偿的情况下,我们得到了10−4量级的最近邻相对强度串扰。这与之前的其他单个寻址演示相当或更好。同时,我们的模块化方法提供了对每个通道的幅度、频率和相位的独立和敏捷控制;结合以前实现的优点。
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A guided light system for agile individual addressing of Ba+ qubits with 10−4 level intensity crosstalk
Trapped ions are one of the leading platforms for quantum information processing, exhibiting the highest gate and measurement fidelities of all contending hardware. In order to realize a universal quantum computer with trapped ions, independent and parallel control over the state of each qubit is necessary. The manipulation of individual qubit states in an ion chain via stimulated Raman transitions generally requires light focused on individual ions. In this manuscript, we present a novel, guided-light individual addressing system for hyperfine Ba+ qubits. The system takes advantage of laser-written waveguide technology, enabled by the atomic structure of Ba+, allowing the use of visible light to drive Raman transitions. Such waveguides define the spatial mode of light, suppressing aberrations that would have otherwise accumulated in a free-space optics set up. As a result, we demonstrate a nearest neighbor relative intensity crosstalk on the order of 10−4, without any active aberration compensation. This is comparable to or better than other previous demonstrations of individual addressing. At the same time, our modular approach provides independent and agile control over the amplitude, frequency, and phase of each channel; combining the strengths of previous implementations.
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来源期刊
Quantum Science and Technology
Quantum Science and Technology Materials Science-Materials Science (miscellaneous)
CiteScore
11.20
自引率
3.00%
发文量
133
期刊介绍: Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. Quantum Science and Technology is a new multidisciplinary, electronic-only journal, devoted to publishing research of the highest quality and impact covering theoretical and experimental advances in the fundamental science and application of all quantum-enabled technologies.
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