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Related Concept Videos

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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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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Subatomic Particles

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Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
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Fermi Level

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The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
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Atomic Orbitals

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An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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On-Surface Atomic Scale Qubit Platform.

Christoph Wolf1,2, Andreas J Heinrich1,3, Soo-Hyon Phark1,2

  • 1Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul 03760, Korea.

ACS Nano
|October 9, 2024
PubMed
Summary
This summary is machine-generated.

Localized electron spins on surfaces are emerging as key building blocks for quantum nanostructures. This approach offers a promising pathway for quantum information science and quantum computing applications.

Keywords:
ESR-STMelectron spin resonanceopen quantum systemsquantum computingquantum sciencequantum-coherent nanosciencescanning tunneling microscopysurface science

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Area of Science:

  • Quantum physics
  • Materials science
  • Nanotechnology

Background:

  • Scanning probe microscopy and electron spin resonance have advanced significantly.
  • Localized electron spins on surfaces are recognized as potential quantum building blocks.

Purpose of the Study:

  • To review recent advances in utilizing on-surface atomic spins.
  • To outline the advantages of this platform for quantum applications.
  • To identify challenges in applying this technology to quantum information science and computing.

Main Methods:

  • Leveraging scanning probe microscopy for spin manipulation.
  • Employing electron spin resonance for spin detection and characterization.
  • Theoretical and experimental approaches for bottom-up assembly of nanostructures.

Main Results:

  • Demonstrated feasibility of using localized surface spins as quantum building blocks.
  • Highlighted the potential for creating quantum-coherent nanostructures.
  • Identified key advantages of the on-surface atomic spin platform.

Conclusions:

  • On-surface atomic spins represent a promising platform for quantum information science.
  • Further research is needed to overcome challenges for practical quantum computing applications.
  • This approach facilitates the bottom-up assembly of functional quantum nanostructures.