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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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Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Quantum Stream Cipher Based on Holevo-Yuen Theory.

Masaki Sohma1, Osamu Hirota1

  • 1Quantum ICT Research Institute, Tamagawa University, Tokyo 194-8610, Japan.

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|May 28, 2022
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Summary

Quantum stream ciphers offer advanced security for future networks, potentially surpassing traditional methods. This review explores their development and practical applications in social networks, highlighting their role in quantum-resistant cryptography.

Keywords:
optical fiber communicationoptical satellite communicationphysical cipherquantum communication theory

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Area of Science:

  • Cryptography
  • Quantum Information Science
  • Network Security

Background:

  • The advent of quantum computing necessitates quantum-resistant cryptography for future network security.
  • Current quantum cryptography research includes Quantum Key Distribution (QKD) and quantum stream ciphers.
  • QKD faces limitations in real-world applications, driving interest in alternative solutions.

Purpose of the Study:

  • To introduce the fundamental concepts of quantum computer-resistant cryptography.
  • To position mathematical and quantum cryptography within the current research landscape.
  • To highlight the potential of quantum stream ciphers as a core next-generation communication technology.

Main Methods:

  • Review of existing literature on quantum cryptography, focusing on QKD and quantum stream ciphers.
  • Analysis of the technical challenges and limitations of single-photon-based QKD.
  • Exploration of modulation techniques for creating quantum properties in macroscopic coherent states.

Main Results:

  • Quantum stream ciphers, utilizing macroscopic coherent states, are identified as a promising countermeasure.
  • These ciphers offer potential for superior security performance compared to the one-time pad.
  • Challenges with current QKD methods hinder their widespread adoption in social systems.

Conclusions:

  • Quantum stream ciphers are emerging as a key technology for next-generation communication systems.
  • Further research and development are crucial for the practical implementation of quantum stream ciphers in social networks.
  • The study emphasizes the potential of quantum stream ciphers to provide enhanced security in the post-quantum era.