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相关概念视频

Superconductor01:24

Superconductor

1.7K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.7K
Types Of Superconductors01:28

Types Of Superconductors

1.6K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.6K
Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

2.0K
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...
2.0K
Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

1.1K
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 the...
1.1K
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

2.1K
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
2.1K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

4.5K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
4.5K

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相关实验视频

Updated: Jan 15, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.2K

对于500量子比特级超导量子处理器的高密度布线解决方案.

J J Tian1,2,3, Y Song1, P Liu1

  • 1Beijing Key Laboratory of Fault-Tolerant Quantum Computing, Beijing Academy of Quantum Information Sciences, Beijing 100193, China.

The Review of scientific instruments
|October 13, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种用于量子计算的高密度布线解决方案,可以控制数百个量子比特. 这一突破管理了稀释制冷器中的热负荷,这对于扩展量子处理器至关重要.

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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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相关实验视频

Last Updated: Jan 15, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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科学领域:

  • 量子计算是一种量子计算.
  • 低温工程 低温工程是什么?
  • 材料科学 材料科学 材料科学

背景情况:

  • 将超导量子处理器扩展到数百个量子比特对于实现量子优势和实施强大的量子错误校正至关重要.
  • 将广泛的控制和读取布线整合到冷系统中,会带来重大的热管理和性能挑战.

研究的目的:

  • 开发和验证用于大型超导量子处理器的高密度布线解决方案.
  • 为了解决用于量子比特控制和读取的稀释制冷器内的热预算限制.

主要方法:

  • 系统分析稀释制冷器中的热预算.
  • 开发高密度0.5毫米SCuNi-CuNi同轴电缆集,优化用于热负荷管理.
  • 集成696个控制线和40个读出放大链.

主要成果:

  • 在100mK时成功运行1mW的冷却功率的稀释制冷器,在一年多的时间里保持稳定的基温为~8mK.
  • 使用540量子比特处理器 (平均T1为35μs) 和156量子比特处理器 (182个可调节合器) 证明了性能.
  • 实现了高平均保真率:单量子比特网关的99.9%,双量子比特网关的99.0%.

结论:

  • 已经证明了一种可行的高密度布线解决方案,用于在500量子比特级别控制和测量处理器.
  • 开发的同轴电缆套件有效地管理热负荷,从而实现稳定的冷运行.
  • 这项工作为开发更大规模的量子计算系统提供了关键的工程见解.