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相关概念视频

Passive Diffusion: Overview and Kinetics01:17

Passive Diffusion: Overview and Kinetics

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Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
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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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Deactivation Processes: Jablonski Diagram01:25

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Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
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The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
 
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
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The Quantum-Mechanical Model of an Atom02:45

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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 arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
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完全被动的量子密钥分布

Wenyuan Wang1, Rong Wang1, Chengqiu Hu1

  • 1Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong.

Physical review letters
|June 16, 2023
PubMed
概括
此摘要是机器生成的。

我们介绍了一种被动量子密钥分布 (QKD) 源,用于安全通信. 这种新的设计消除了调制器侧通道,增强了各种QKD协议的安全性.

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科学领域:

  • 量子信息科学 量子信息科学
  • 量子密码学 量子密码学
  • 光子学 是一个光子学.

背景情况:

  • 量子密钥分配 (QKD) 源中的活性调制器可以通过侧通道泄漏引入安全漏洞.
  • 现有的QKD协议通常依赖于复杂的活跃组件,限制其实际实施和安全性.

研究的目的:

  • 提出一个完全被动的线性光学量子密钥分布 (QKD) 源.
  • 消除QKD源中与活性调节器相关的侧通道.
  • 为了展示一个与多个协议兼容的多功能QKD源.

主要方法:

  • 使用完全被动的线性光学设置用于QKD.
  • 实施随机诱状态和编码选择仅通过后选择.
  • 通过实验性原则证明测量来描述源的性能.

主要成果:

  • 展示了一个完全被动的QKD源,消除了主动调节器侧通道.
  • 展示了源与BB84,六态和独立于参考框架的QKD协议的兼容性.
  • 提供对源的可行性和性能进行实验验证.

结论:

  • 拟议的被动QKD源通过删除调制器侧通道来提供增强的安全性.
  • 这种通用源可以与现有和先进的QKD协议集成,包括测量设备独立的QKD.
  • 实验性表征证实了这种安全通信技术的实际可行性.