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Related Concept Videos

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 one, the...
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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
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A molecular quantum spin network controlled by a single qubit.

Lukas Schlipf1,2, Thomas Oeckinghaus2, Kebiao Xu1,2,3

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Researchers engineered a molecular chemistry building block for scalable quantum networks. This peptide-based unit allows collective control and readout using nitrogen vacancy centers in diamond.

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Area of Science:

  • Quantum technology
  • Molecular chemistry
  • Nanoscale engineering

Background:

  • Scalable quantum technologies demand precise nanoscale control of quantum systems.
  • Identifying elementary building blocks for quantum networks is a significant challenge.

Purpose of the Study:

  • To present a molecular chemistry-engineered unit for scalable quantum networks.
  • To demonstrate collective control and readout of molecular spin systems using nitrogen vacancy centers.

Main Methods:

  • Utilized synthetic polyproline with attached molecular side groups as the basic unit.
  • Employed nitrogen vacancy (NV) center in diamond for collective control and readout.
  • Investigated electron spins (S=1/2) localized on molecular side groups.

Main Results:

  • Demonstrated collective readout and coherent manipulation of few (≤ 6) electronic spin systems.
  • Successfully accessed the direct dipolar coupling tensor of the spin systems.
  • Showcased optical readout of single quantum states via NV magnetometry.

Conclusions:

  • Spin-labeled peptides are a viable resource for molecular qubit-based quantum networks.
  • Established a foundation for constructing arbitrary quantum networks using established chemistry methods.
  • Potential applications include molecular distance mapping and quantum information processing.