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相关概念视频

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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Photoelectric Effect02:26

Photoelectric Effect

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When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
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Quantum Numbers02:43

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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Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

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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...
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Phasor Arithmetics01:13

Phasor Arithmetics

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Phasors and their corresponding sinusoids are interrelated, offering unique insights into the behavior of alternating current (AC) circuits. One way to understand this relationship is through the operations of differentiation and integration in both the time and phasor domains.
When the derivative of a sinusoid is taken in the time domain, it transforms into its corresponding phasor multiplied by j-omega (jω) in the phasor domain, where j is the imaginary unit, and ω is the angular...
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Non-ohmic Devices00:51

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In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
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相关实验视频

Updated: Jun 24, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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使用量子光子芯片进行实验量子同态加密.

Yuan Li1, Lin Cao2, Wei Luo1

  • 1Institute of Quantum Technology (IQT), The Hong Kong Polytechnic University, Hong Kong, 11 Yuk Choi Rd, Hung Hom, Hong Kong.

Physical review letters
|June 3, 2024
PubMed
概括
此摘要是机器生成的。

我们使用光子芯片演示了一个可扩展的量子同态加密系统. 这一突破使加密数据上的安全量子计算成为可能,克服了传统系统的局限性.

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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科学领域:

  • 量子信息科学 量子信息科学
  • 密码学 密码学 密码学
  • 光子集成电路的光子集成电路.

背景情况:

  • 完全同型加密 (FHE) 允许对加密数据进行计算,这对于安全的云计算至关重要.
  • 现有的FHE系统面临着可扩展性和稳定性挑战,阻碍了实际应用.
  • 对于分布式量子计算和安全访问量子资源,需要安全的量子通道.

研究的目的:

  • 在一个紧的量子芯片上实验证明量子同态加密 (QHE) 的概念证明.
  • 为了解决传统同型加密系统的可扩展性限制.
  • 验证使用光子芯片实现QHE的可行性.

主要方法:

  • 在一个紧的光子量子芯片上实施同型加密方案.
  • 实验验证该方案的功能,以实现安全的量子计算.
  • 专注于电路扩展和量子网络基础设施的小型化.

主要成果:

  • 在量子芯片上成功实验证明了同型加密方案.
  • 验证光子芯片用于量子同态加密的可行性.
  • 量子网络基础设施规模的显著减少.

结论:

  • 光子量子芯片为可扩展的量子同态加密提供了一个可行的平台.
  • 这项工作克服了量子同态加密中的关键可扩展性挑战.
  • 这些发现为先进,高度复杂的量子FHE系统铺平了道路.