Quantum computing with trapped ions Fast, high-fidelity entanglement via optical phase control

使用捕获离子进行量子计算 通过光学相位控制实现快速、高保真纠缠

• 批准号: 2886990
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2886990
• 关键词: Quantum; computing; trapped; ions; Fast

Trapped-ion devices have demonstrated, on a small number of qubits, all the building-blocks required to build a quantum computer with precision better than any competing technology. The aim of this project is to develop and utilise a world class intermediate scale quantum computer that, by virtue of high-fidelity any qubit to-any qubit entangling gates along with low error rates, will operate at a performance level currently unachievable in any other architecture.Dr Chris BallanceTrapped-ion devices have demonstrated, on a small number of qubits, all the building-blocks required to build a quantum computer with precision better than any competing technology. However the speed of these devices, limited by the entangling gates, has not increased commensurately. The aim of this project is to change this by exploiting optical phase control to significantly speed up trapped ion entangling gates whilst also removing several currently limiting fundamental sources of error. In preliminary work, we have recently demonstrated the first high speed entangling logic gates for trapped ion qubits. We achieved a fidelity of 99.8% for a 1.6 gate time, close to the highest reported two-qubit gate fidelities of 99.9%, but more than an order of magnitude faster. Over the course of this project we will extend this proof-of-concept technique to demonstrate the first high-speed control of multi-qubit registers.

俘获离子设备已经在少量量子位上展示了构建量子计算机所需的所有构建块，其精度优于任何竞争技术。该项目的目标是开发和利用世界一流的中型量子计算机，凭借任何量子位到任何量子位纠缠门的高保真度以及低错误率，该计算机将以目前任何其他量子位都无法实现的性能水平运行。 Chris Ballance 博士的陷阱离子设备已经在少量量子比特上展示了构建量子计算机所需的所有构建块，其精度优于任何竞争技术。然而，由于纠缠门的限制，这些设备的速度并没有相应提高。该项目的目的是通过利用光学相位控制来显着加速捕获离子纠缠门，同时消除当前限制的几个基本误差源，从而改变这一现状。在前期工作中，我们最近展示了第一个用于捕获离子量子位的高速纠缠逻辑门。我们在 1.6 个门时间下实现了 99.8% 的保真度，接近报道的最高 99.9% 的双量子位门保真度，但速度快了一个数量级以上。在这个项目的过程中，我们将扩展这种概念验证技术，以演示多量子位寄存器的第一个高速控制。