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Entanglement in a 20-Qubit Superconducting Quantum Computer.

Gary J Mooney1, Charles D Hill1, Lloyd C L Hollenberg2

  • 1University of Melbourne, School of Physics, Melbourne, 3010, Australia.

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Summary
This summary is machine-generated.

Researchers confirmed entanglement in a 20-qubit superconducting quantum computer. This demonstrates progress in creating multi-qubit entangled states for quantum computing.

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Area of Science:

  • Quantum Computing
  • Quantum Information Science
  • Superconducting Qubits

Background:

  • Preparing multi-qubit entangled states is crucial for advancing quantum computing hardware.
  • Superconducting quantum processors offer a promising platform for scalable quantum computation.

Purpose of the Study:

  • To investigate the presence and extent of entanglement in a 20-qubit graph state.
  • To assess the capability of a superconducting quantum computer for generating complex entangled states.

Main Methods:

  • A 20-qubit graph state was prepared on the IBM Q Poughkeepsie superconducting quantum computer.
  • Quantum state tomography was performed on groups of four connected qubits.
  • A genuine multipartite entanglement witness was measured on qubit subpaths.

Main Results:

  • Each pair of connected qubits within the graph state was found to be entangled.
  • Genuine multipartite entanglement was confirmed on chains of up to three qubits.
  • The study successfully demonstrated entanglement in a large-scale solid-state qubit array.

Conclusions:

  • The results validate the potential of superconducting qubits for generating significant entanglement.
  • This work represents a key step towards implementing advanced quantum algorithms that rely on multipartite entanglement.
  • The findings indicate positive progress in the development of robust quantum computing platforms.