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Mapping a 50-spin-qubit network through correlated sensing.

G L van de Stolpe1,2, D P Kwiatkowski1,2, C E Bradley1,2

  • 1QuTech, Delft University of Technology, PO Box 5046, 2600, GA Delft, The Netherlands.

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|March 5, 2024
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Summary
This summary is machine-generated.

Researchers mapped a 50-spin network using a single nitrogen-vacancy (NV) center in diamond. This high-resolution technique advances quantum simulation and sensing by enabling the study of larger spin systems.

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Area of Science:

  • Quantum physics
  • Solid-state defect research
  • Quantum information science

Background:

  • Optically accessible solid-state defects are key for quantum simulation, sensing, and communication.
  • Previous studies demonstrated control over nuclear spins around a single electron spin defect.
  • Limited spectral resolution has restricted the size of addressable spin networks.

Purpose of the Study:

  • To overcome spectral resolution limitations in mapping spin networks.
  • To develop a high-resolution method for characterizing large coupled spin systems.
  • To expand the capabilities of quantum simulation and sensing platforms.

Main Methods:

  • Utilized a single nitrogen-vacancy (NV) center in diamond for correlated sensing.
  • Developed concatenated double-resonance sequences for spin-chain identification.
  • Fused identified spin-chains to reconstruct the entire spin network.

Main Results:

  • Successfully mapped a network of 50 coupled spins with high spectral resolution.
  • Identified characteristic spin frequencies and interconnections within the network.
  • Demonstrated a method for fusing individual spin-chain data into a comprehensive network map.

Conclusions:

  • The developed high-resolution correlated sensing scheme significantly increases the accessible size of spin networks.
  • This advancement offers new possibilities for quantum simulations by increasing the number of usable spin qubits.
  • The methodology holds potential for nanoscale imaging of external complex spin systems.