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相关概念视频

Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

629
A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of...
629

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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量子电路映射用于基于MZI的集成光学中的通用和可扩展计算.

Yong Kwon, Alessio Baldazzi, Lorenzo Pavesi

    Optics express
    |April 4, 2024
    PubMed
    概括

    本研究介绍了使用集成光子学进行线性光学量子计算 (LOQC) 的可扩展方法. 它增强了用于通用量子计算的受控Z门,使更大,更有效的量子电路成为可能.

    科学领域:

    • 量子信息科学 量子信息科学
    • 综合光子学 综合光子学
    • 量子计算是一种量子计算.

    背景情况:

    • 线性光学量子计算 (LOQC) 利用强大的技术和灵活的条件,与DiVincenzo的标准保持一致.
    • 集成光子学使基于网关的量子计算能够使用路径编码量子比特和马赫-泽恩德干扰仪 (MZIs).
    • 选择后的控制Z (CZ) 门对通用双量子比特操作具有资源效率,但缺乏正规结构和级联性,阻碍了可扩展性.

    研究的目的:

    • 在集成光子平台上开发一种通用和可扩展的LOQC方法.
    • 为了克服现有的后选择的CZ门的局限性,用于大规模的量子计算.
    • 为了证明使用拟议的可扩展架构生成纠状态的可行性.

    主要方法:

    • 扩展路径编码的双轨量子比特到三组波导,包括辅助波导.
    • 引入了一个交换光子网络,为后选择的 CZ 门绘制量子位结构.
    • 开发了一个用于非最近邻居量子位相互作用的光学交换门,并演示了CZ门的级联.

    主要成果:

    • 一个新的,有规律结构的路径编码量子位,适合可扩展的集成光子学.
    • 在任意路径编码的量子比特之间展示了决定性的量子比特位置交换和受控的量子门.

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  • 通过切断辅助波导,成功地实现了选择后的CZ门的级联.
  • 展示了贝尔和格林伯格-霍恩-齐林格 (GHZ) 状态生成电路,使用正规结构,级联和光学交换.

    • 结论:

    • 拟议的方法可以在集成光子平台上实现通用和可扩展的LOQC.
    • 开发的方法克服了之前LOQC实施的结构和级联限制.
    • 这项工作为建造更大,更复杂的光子量子计算机铺平了道路.