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Related Concept Videos

¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

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.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

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Carbon nanotubes as cooper-pair beam splitters.

L G Herrmann1, F Portier, P Roche

  • 1Ecole Normale Supérieure, Laboratoire Pierre Aigrain, 24, rue Lhomond, 75231 Paris Cedex 05, France.

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|April 7, 2010
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Summary
This summary is machine-generated.

Researchers demonstrated tunable crossed Andreev reflections in carbon nanotube quantum dots. This breakthrough enables advanced quantum optics experiments with entangled electrons.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Information Science

Background:

  • Quantum dots offer tunable electronic properties.
  • Superconducting components are crucial for advanced quantum phenomena.

Purpose of the Study:

  • To investigate crossed Andreev reflections in carbon nanotube double quantum dots.
  • To demonstrate in situ tunability of these quantum effects.

Main Methods:

  • Fabrication of carbon nanotube based double quantum dots.
  • Conductance measurements with normal electrodes and a superconducting finger.
  • Operation of devices as beam splitters.

Main Results:

  • Evidence for tunable crossed Andreev reflections was observed.
  • Successful operation of quantum dots as beam splitters.

Conclusions:

  • The study provides a new platform for quantum optics-like experiments.
  • Enables future research in spin-entangled electron manipulation.