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Dilute Gd hydroxycarbonate particles for localized spin qubit integration.

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Researchers developed novel gadolinium-doped nanoparticles for hybrid quantum processors. These particles demonstrate robust quantum coherence, offering a promising new material for quantum computing hardware.

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Area of Science:

  • Quantum computing
  • Materials science
  • Nanotechnology

Background:

  • Molecular spins are key for hybrid quantum processors, enabling coherent manipulation via superconducting devices.
  • Current approaches use large crystals or nano-deposits, posing scalability and integration challenges.

Purpose of the Study:

  • To evaluate sub-micronic spherical particles of doped Gd@Y hydroxycarbonate as an alternative qubit material.
  • To develop methods for integrating these particles with superconducting quantum circuits.

Main Methods:

  • Synthesized spherical particles with controlled size and doping for adjustable spin carrier numbers.
  • Characterized magnetic properties and quantum coherence using bulk magnetometry and EPR spectroscopy.
  • Integrated particles onto superconducting resonators via interfacial monolayer formation and Dip-Pen Nanolithography.

Main Results:

  • Gd spins within the synthesized particles exhibit robust quantum coherence, identifying them as potential qubits.
  • Successful interfacial transfer of particle monolayers onto niobium superconducting resonators.
  • Controlled deposition of particle clusters using nanolithography techniques.

Conclusions:

  • Doped Gd@Y hydroxycarbonate nanoparticles offer a promising new material for hybrid quantum processors.
  • Developed versatile methods for integrating these molecular qubits with superconducting devices.
  • This work advances the development of practical hybrid quantum computing architectures.