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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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Atom-by-Atom Construction of a Quantum Device.

Jason R Petta1

  • 1Department of Physics, Princeton University , Princeton, New Jersey 08544, United States.

ACS Nano
|March 11, 2017
PubMed
Summary
This summary is machine-generated.

Researchers used a scanning tunneling microscope (STM) to probe a single-atom transistor at GHz frequencies. This advancement enables excited-state spectroscopy for future quantum control applications.

Keywords:
Kane quantum computerphosphorusquantum devicesiliconspectroscopy

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Area of Science:

  • Nanoscience and Nanotechnology
  • Quantum Computing
  • Surface Science

Background:

  • Scanning tunneling microscopes (STMs) conventionally provide atomic resolution of surfaces.
  • Recent STM advancements include spin-polarized and superconducting tips, time-domain spectroscopy, and atomically precise silicon nanoelectronics fabrication.
  • Previous studies probed single-atom transistors in the MHz regime.

Purpose of the Study:

  • To probe a single-atom transistor fabricated using STM at GHz frequencies.
  • To enable excited-state spectroscopy and measure excited-state lifetimes in silicon nanoelectronics.
  • To advance the development of spin-based quantum computers through precise atom-by-atom fabrication.

Main Methods:

  • Fabrication of a single-atom transistor in silicon using STM lithography.
  • Probing the device at microwave frequencies, specifically in the GHz regime.
  • Utilizing STM for atom-by-atom construction of donor-based devices.

Main Results:

  • Successful probing of a single-atom transistor at GHz frequencies.
  • Demonstration of excited-state spectroscopy and measurement of excited-state lifetimes.
  • Advancement in STM lithography for potential large-scale quantum device construction.

Conclusions:

  • Probing single-atom transistors at GHz frequencies is feasible and enables new spectroscopic measurements.
  • This work contributes to the development of quantum control by providing insights into excited-state dynamics.
  • STM-based fabrication holds promise for the bottom-up construction of practical quantum computing devices.