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Related Concept Videos

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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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.
Reaction Quotient...
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Atomic Nuclei: Nuclear Spin State Overview01:03

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
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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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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 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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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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A Semi-Quantum Private Comparison Base on W-States.

Jian Li1,2, Zhuo Wang3, Jun Yang1

  • 1School of Information Engineering, Ningxia University, Yinchuan 750021, China.

Entropy (Basel, Switzerland)
|September 28, 2023
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Summary

This study introduces a more efficient semi-quantum privacy comparison method using W-states to counter quantum computing threats. The new scheme enhances security and communication efficiency for privacy-critical applications.

Keywords:
quantum communicationquantum cryptographyquantum private comparison

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Area of Science:

  • Secure multi-party computing
  • Quantum information science
  • Cryptography

Background:

  • Privacy comparison is crucial for secure multi-party computing (SMC) in areas like e-commerce and secret ballots.
  • Advancements in quantum computing pose significant security risks to existing SMC algorithms.
  • Current quantum privacy comparison schemes often lack optimal efficiency.

Purpose of the Study:

  • To propose a novel, highly efficient semi-quantum privacy comparison method.
  • To address the security vulnerabilities introduced by quantum computing.
  • To enhance the practicability of quantum-resistant privacy comparison.

Main Methods:

  • Development of a semi-quantum privacy comparison protocol.
  • Utilizing the W-state as a fundamental quantum resource.
  • Rigorous security analysis against potential quantum attacks.

Main Results:

  • The proposed scheme demonstrates enhanced communication efficiency compared to existing methods.
  • Security analysis confirms resistance to third-party, measurement, and entanglement attacks.
  • The method exhibits improved practicability for real-world applications.

Conclusions:

  • The W-state-based semi-quantum privacy comparison offers a more efficient and secure solution.
  • This approach effectively mitigates quantum computing threats to privacy comparison.
  • The enhanced efficiency and security make the scheme highly practical for various applications.