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相关概念视频

Parallel-axis Theorem01:06

Parallel-axis Theorem

6.5K
The parallel-axis theorem provides a convenient and quick method of finding the moment of inertia of an object about an axis parallel to the axis passing through its center of mass. Consider a thin rod as an example. There is a striking similarity between the process of finding the moment of inertia of a thin rod about an axis through its middle, where the center of mass lies, and about an axis through its end using the conventional method. In the conventional method, the concept of linear mass...
6.5K
Parallel-Axis Theorem for an Area01:12

Parallel-Axis Theorem for an Area

1.5K
The moment of inertia is a fundamental concept in mechanical engineering that plays a significant role in designing rotationally symmetric objects such as flywheels, gears, and other mechanical systems. In this context, we will discuss the moment of inertia of a flywheel rotating about its centroidal axis and how it relates to the moment of inertia about an axis parallel to it.
For a flywheel approximated as a solid disc, consider an infinitesimal differential element with an arbitrary distance...
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Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

613
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...
613
Superconductor01:24

Superconductor

1.1K
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...
1.1K
Quantum Numbers02:43

Quantum Numbers

34.6K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
34.6K
Singularity Functions for Shear01:26

Singularity Functions for Shear

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In structural analysis, singularity functions are crucial in simplifying the representation of shear forces in beams under discontinuous loading. These functions describe discontinuous  variations in shear force across a beam with varying loads by using a single mathematical expression, regardless of the complexity of the loading conditions. The singularity functions are derived from creating a free-body diagram of the beam and then making conceptual cuts at specific points to examine the...
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Updated: Jun 21, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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在可编程超导量子处理器上的圆交叉点的量子计算.

Shoukuan Zhao1, Diandong Tang2, Xiaoxiao Xiao2

  • 1Beijing Academy of Quantum Information Sciences, Beijing 100193, China.

The journal of physical chemistry letters
|July 8, 2024
PubMed
概括
此摘要是机器生成的。

这项研究展示了第一个混合量子-经典方法 (VQE-SA-CASSCF) 来研究量子硬件上的形交叉点 (CI). 这一突破使得对复杂的化学系统进行精确的CI调查成为可能.

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科学领域:

  • 量子化学 是一个量子化学.
  • 摄影化学的使用.
  • 计算科学 计算科学

背景情况:

  • 圆交点 (CIs) 对光化学过程至关重要,但对经典计算机来说计算要求很高.
  • 传统方法在活动空间中与电子施罗丁格方程作斗争.
  • 量子计算为研究CI提供了潜在的途径,但其在真实硬件上的实际应用尚未得到充分探索.

研究的目的:

  • 在超导量子处理器上演示第一个混合量子-经典状态平均完全活跃空间自相一致场 (VQE-SA-CASSCF) 方法.
  • 使用这种新型量子方法,研究乙烯和三原子中的圆交叉点 (CI).

主要方法:

  • 实现一个混合量子经典VQE-SA-CASSCF算法.
  • 在超导量子处理器上执行.
  • 应用于原型系统:乙烯 (C2H4) 和三原子 (H3).

主要成果:

  • 在量子硬件上成功实现了VQE-SA-CASSCF.
  • 在研究系统中准确描述形交叉点 (CI).
  • 证明当前量子设备的可行性,并进行持续改进.

结论:

  • VQE-SA-CASSCF方法是研究现有量子硬件上的CI的一个可行的方法.
  • 这项工作为量子计算应用于更复杂的光化学系统铺平了道路.
  • 量子硬件和算法的进步将进一步提高CI研究的能力.