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相关概念视频

Types Of Superconductors01:28

Types Of Superconductors

1.0K
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...
1.0K
Superconductor01:24

Superconductor

1.2K
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...
1.2K
Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

1.5K
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...
1.5K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

2.6K
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.
2.6K
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

3.6K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
3.6K
Magnetic Damping01:17

Magnetic Damping

477
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
477

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相关实验视频

Updated: Jul 14, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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双轨编码与超导空腔的双轨编码.

James D Teoh1,2,3, Patrick Winkel1,2,3, Harshvardhan K Babla1,2,3

  • 1Department of Applied Physics, Yale University, New Haven, CT 06511.

Proceedings of the National Academy of Sciences of the United States of America
|October 6, 2023
PubMed
概括
此摘要是机器生成的。

我们开发了一种新的量子硬件设计,电路-量子电动力学 (QED) 双轨量子位,以减少量子计算中的错误. 这种设计将错误转换为可纠正的删除错误,为实际的量子错误纠正铺平了道路.

关键词:
量子计算是一种量子计算.量子错误的纠正 量子错误的纠正量子信息是一种量子信息.超导电路中的超导电路.

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科学领域:

  • 量子计算是一种量子计算.
  • 量子错误纠正方法 量子错误纠正方法
  • 超导电路中的超导电路

背景情况:

  • 量子错误校正 (QEC) 对于可靠的量子计算至关重要.
  • 减少和减轻量子硬件中的错误对于推进QEC至关重要.
  • 现有的量子硬件面临着像光子损失这样的主导错误源的挑战.

研究的目的:

  • 为了引入一种新的量子硬件设计,电路-量子电动力学 (QED) 双轨量子比特.
  • 展示一种将占主导地位的光子损失错误转换为可纠正的删除错误的方法.
  • 为了实现通用量子操作,使用基于门的方法,最小的辅助开销.

主要方法:

  • 在两个超导微波腔的单光子子空间中编码物理量子位.
  • 使用一个传唤辅助器进行门操作,状态准备和读出.
  • 实施错误检测和转换机制,将硬件错误转化为删除错误.

主要成果:

  • 电路QED双轨量子位有效地将光子损失错误转换为删除错误.
  • 一组基于门的通用量子运算 (状态准备,读取,单/双量子比特门) 可以通过每个量子比特实现一个跨子 ancilla.
  • 一级硬件错误被转换为删除错误,留下显著较小的背景保利错误.

结论:

  • 双轨腔量子比特显示出一个有利的错误率层次结构.
  • 这种量子比特设计预计将在当前连贯时间下有效地表现在相关QEC值以下.
  • 拟议的电路-QED实现为QEC提供了与线性光学方法相比的独特优势.