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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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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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The Wave Nature of Light
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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
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Quantum Numbers
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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.
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Atomic Absorption Spectroscopy: Radiation and Light Sources
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Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
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Carrier Transport
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The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
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在巴尔的摩轻轨上 连接到量子未来
Krzysztof Domino1, Emery Doucet2,3, Reece Robertson4,5,6
1Institute of Theoretical and Applied Informatics, Polish Academy of Sciences, Bałtycka 5, 44-100, Gliwice, Poland. kdomino@iitis.pl.
Scientific reports
|August 12, 2025
概括
本研究展示了如何在杂的中等尺度量子 (NISQ) 设备中使用量子噪声作为优化计算资源. 研究人员将这一点应用于训练交通管理,展示了复杂的重新调度问题的新方法.
科学领域:
- 量子计算是一种量子计算.
- 运营研究 运营研究
- 运输系统 运输系统
背景情况:
- 噪音中等量级量子 (NISQ) 设备为复杂的优化问题提供了潜力,包括NP难度挑战.
- 当前的量子方法往往低于经典解法器的性能,需要创新的方法.
- 利用固有的量子噪声是提高计算能力的一个尚未探索的策略.
研究的目的:
- 展示使用量子噪声作为优化问题的计算资源.
- 展示NISQ设备在现实世界解决问题的有效应用.
- 探索量子计算的可行性,用于模拟运输网络中的随机干扰.
主要方法:
- 使用D-Wave量子化器和IonQ的基于网关的NISQ计算机.
- 在随机干扰下生成和分析了火车流量管理的解决方案.
- 专注于巴尔的摩轻轨铁路作为电车和铁路网络的案例研究.
主要成果:
- 成功地将两种量子计算范式 (回火和基于网关) 应用于现实世界的运输重定时问题.
- 证明了利用量子噪声进行有效优化的潜力.
- 展示了使用NISQ技术建模随机中断的可行性.
结论:
- 量子噪声可以有效地作为NISQ设备中的计算资源进行优化.
- 这项研究代表了量子回火和基于网关的NISQ计算在电车和铁路调度中的首次应用.
- 对于解决复杂的,现实世界的优化挑战,NISQ技术在运输领域及其他领域具有前景.


