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相关概念视频

Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

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Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
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Divergence and Curl of Magnetic Field01:26

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Magnetic Force Between Two Parallel Currents01:13

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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.
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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
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Magnetic Vector Potential01:15

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In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
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相关实验视频

Updated: Sep 23, 2025

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
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在远程量子磁铁中观察新兴水力动力学

M K Joshi1, F Kranzl1,2, A Schuckert3,4

  • 1Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Technikerstraße 21a, 6020 Innsbruck, Austria.

Science (New York, N.Y.)
|May 13, 2022
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概括

研究人员探索了离子中的量子动力学, 这揭示了非平衡量子物质及其新兴的古典性质.

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科学领域:

  • 量子物理学
  • 凝聚物质物理
  • 统计力学

背景情况:

  • 识别非平衡量子态的普遍性质是一个重大挑战.
  • 预计古典水力动力学将在相互作用的量子系统中普遍出现.

研究的目的:

  • 通过实验探测量子动力学和观察新出现的水力动力学普遍性等级.
  • 调查普遍性类的范围,从正常扩散到异常超扩散.

主要方法:

  • 使用51个单独控制的离子来创建一个长距离的交互自旋链.
  • 在无限温度状态下测量时空解析的相关函数.

主要成果:

  • 观察到一个水力动力学普遍性类的家族,包括莱维飞行 (异常超扩散).
  • 提取的运输系数,将微观系统属性与宏观的水力动力学行为联系起来.

结论:

  • 工程量子系统可以提供对非平衡量子物质的普遍性质的关键见解.
  • 证明了古典水力学从相互作用的量子系统的出现.