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Toward Long-Range Entanglement between Electrically Driven Single-Molecule Magnets.

Khadijeh Najafi1, Aleksander L Wysocki1, Kyungwha Park1

  • 1Department of Physics , Virginia Tech , Blacksburg , Virginia 24061 , United States.

The Journal of Physical Chemistry Letters
|November 13, 2019
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Researchers explored the TbPc2 single-molecule magnet for quantum computing. Its electric field sensitivity, via the hyperfine Stark effect, enables long-range entanglement between molecules using a superconducting resonator.

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Area of Science:

  • Quantum computing
  • Molecular magnetism
  • Quantum entanglement

Background:

  • Molecules are explored as quantum computer building blocks.
  • Strong interactions and entanglement between molecular qubits remain a challenge.

Purpose of the Study:

  • Investigate TbPc2 single-molecule magnet for quantum computing applications.
  • Demonstrate long-range entanglement between TbPc2 molecules.

Main Methods:

  • Utilizing the hyperfine Stark effect for electric field sensitivity.
  • Employing a superconducting resonator as a mediator for molecular entanglement.

Main Results:

  • TbPc2 exhibits sensitivity to electric fields due to the hyperfine Stark effect.
  • Long-range entanglement between pairs of TbPc2 molecules was achieved via a superconducting resonator.
  • Molecule-resonator interaction approaches the strong-coupling regime.

Conclusions:

  • TbPc2 single-molecule magnets show promise for overcoming challenges in molecular quantum computing.
  • The demonstrated entanglement mechanism could advance the development of scalable quantum computers.