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相关概念视频

RLC Series Circuits01:30

RLC Series Circuits

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An RLC series circuit comprises an inductor, a resistor, and a charged capacitor connected in series. When the circuit is closed, the capacitor begins to discharge through the resistor and inductor by transferring energy from the electric field to the magnetic field. Here, the resistor connected to the circuit causes energy losses; therefore, on the complete discharge of the capacitor, the magnetic field energy acquired by the inductor is less than the original electric field energy of the...
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The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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RLC Circuit as a Damped Oscillator01:30

RLC Circuit as a Damped Oscillator

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An RLC circuit combines a resistor, inductor, and capacitor, connected in a series or parallel combination.
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
953
The de Broglie Wavelength02:32

The de Broglie Wavelength

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

289
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
289
Equation of Rotational Dynamics01:08

Equation of Rotational Dynamics

8.2K
Angular variables are introduced in rotational dynamics. Comparing the definitions of angular variables with the definitions of linear kinematic variables, it is seen that there is a mapping of the linear variables to the rotational ones. Linear displacement, velocity, and acceleration have their equivalents in rotational motion, which are angular displacement, angular velocity, and angular acceleration. Similar to the rotational variables, a mapping exists from Newton's second law of motion...
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相关实验视频

Updated: Jun 23, 2025

Gradient Echo Quantum Memory in Warm Atomic Vapor
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Gradient Echo Quantum Memory in Warm Atomic Vapor

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量子子用林德布莱德的速率方程进行了量子.

Luis Octavio Castaños-Cervantes1,2, Jesús Casado-Pascual3

  • 1Facultad de Ingeniería, Universidad Nacional Autónoma de México, Circuito Escolar 04360, C.U., Coyoacán, 04510 Ciudad de México, México.

Physical review. E
|June 22, 2024
PubMed
概括

在波动格子上的量子随机步行模型显示,定向运动是可能的. 不为零的过渡速率对于粒子速度至关重要,粒子速度可以反向方向多次.

科学领域:

  • 量子力学就是量子力学.
  • 凝聚物质物理学 凝聚物质物理学
  • 统计力学就是统计力学.

背景情况:

  • 量子随机步行 (QRWs) 是量子信息和计算的基础.
  • 对具有波动性质的动态系统进行建模对于理解复杂行为至关重要.

研究的目的:

  • 在波动的单维周期格上建立量子随机步行模型.
  • 在这样的系统中分析定向运动的条件和特征.

主要方法:

  • 使用Lindblad速率方程来描述格子状态过渡的模型的开发.
  • 利用系统对称性来导出粒子速度的有限方程集.
  • 用于定向运动分析的长时间极限速度的分析推导.

主要成果:

  • 粒子速度可以通过有限的方程集来描述,尽管存在无限维的状态空间.
  • 获得了长时间极限速度的分析表达式.
  • 观察到多个速度反转,表明复杂的动态.
  • 定向运动需要在格子状态之间具有不同的,非零的过渡速率.

结论:

  • 该研究提供了一个理论框架,用于理解在波动格子上的量子步行.

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  • 不为零的过渡速率是实现定向运动的关键要求.
  • 该模型提供了关于在动态环境中量子传输的控制和特征的见解.