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Related Concept Videos

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In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
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Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Atomic Nuclei: Nuclear Spin01:08

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All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
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Spin–Spin Coupling: One-Bond Coupling01:17

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Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
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The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
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Whole-cell Super-Resolution Imaging via DNA-PAINT on a Spinning Disk Confocal with Optical Photon Reassignment
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Single-spin CCD.

T A Baart1, M Shafiei1, T Fujita1

  • 1QuTech and Kavli Institute of Nanoscience, TU Delft, GA Delft 2600, The Netherlands.

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Summary
This summary is machine-generated.

Researchers precisely controlled individual electron spins in a semiconductor quantum dot array. This demonstrates a

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Area of Science:

  • Quantum physics and condensed matter physics.
  • Spintronics and quantum information science.

Background:

  • Spintronics utilizes electron spin for data storage and processing.
  • Achieving precise control over individual electron spins is crucial for advancing quantum technologies.

Purpose of the Study:

  • To demonstrate the manipulation, transport, and readout of individual electron spins in a linear array of semiconductor quantum dots.
  • To assess the fidelity and stability of spin manipulation and transport.

Main Methods:

  • Utilized a linear array of three semiconductor quantum dots.
  • Employed single-shot readout techniques with high fidelity.
  • Implemented site-selective spin control for writing information.
  • Performed repeated shuttling of electrons to test spin coherence.

Main Results:

  • Achieved average single-shot readout fidelities of 97% for three spins.
  • Demonstrated site-selective control, enabling 'writing' of spin information.
  • Showed negligible influence on spin projection after extensive electron shuttling (80 μm cumulative distance).

Conclusions:

  • The study successfully demonstrated key operations for a single-spin quantum information processor.
  • Results indicate the potential for scaling up to larger arrays for quantum computing and sensing applications.
  • The developed techniques pave the way for advanced spintronic devices.