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Related Concept Videos

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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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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Quantum Numbers02:43

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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 Aufbau Principle and Hund's Rule03:02

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To determine the electron configuration for any particular atom, we can build the structures in the order of atomic numbers. Beginning with hydrogen, and continuing across the periods of the periodic table, we add one proton at a time to the nucleus and one electron to the proper subshell until we have described the electron configurations of all the elements. This procedure is called the aufbau principle, from the German word aufbau (“to build up”). Each added electron occupies the...
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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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Electron Configuration of Multielectron Atoms03:26

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The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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Single-Electron Qubits Based on Quantum Ring States on Solid Neon Surface.

Toshiaki Kanai1,2, Dafei Jin3, Wei Guo1,4

  • 1<a href="https://ror.org/03s53g630">National High Magnetic Field Laboratory</a>, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA.

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Summary
This summary is machine-generated.

Single electrons on solid neon show long coherence times for quantum computing. Surface topography, like bumps, creates quantum ring states, explaining experimental findings and guiding qubit design.

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Area of Science:

  • Quantum Computing
  • Surface Science
  • Condensed Matter Physics

Background:

  • Single electrons on solid neon are a promising platform for charge qubits.
  • Experimental data show long coherence times, but quantum states are not fully understood.
  • Neon surfaces are imperfectly flat, influencing trapped electron behavior.

Purpose of the Study:

  • To investigate the quantum states of electrons trapped on solid neon surfaces.
  • To understand the role of surface topography in electron binding and quantum state formation.
  • To explore magnetic field tuning for qubit operations.

Main Methods:

  • Evaluating induced surface charges to determine electron binding.
  • Solving the Schrödinger equation for lateral electron motion on curved surfaces.
  • Analyzing the effects of topographical variations like bumps and valleys.

Main Results:

  • Demonstrated strong perpendicular binding of electrons to the neon surface.
  • Identified that surface bumps can form unique quantum ring states for trapped electrons.
  • Showed that electron excitation energy is tunable with a magnetic field.

Conclusions:

  • Surface topography significantly influences electron quantum states on solid neon.
  • Quantum ring states provide a model consistent with experimental observations.
  • Findings offer strategies for reducing charge noise and scaling electron-on-neon qubits for quantum computing.