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The Quantum-Mechanical Model of an Atom02:45

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Two-qubit silicon quantum processor with operation fidelity exceeding 99.

Adam R Mills1, Charles R Guinn1, Michael J Gullans1,2

  • 1Department of Physics, Princeton University, Princeton, NJ 08544, USA.

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Summary
This summary is machine-generated.

High-fidelity quantum operations were achieved in silicon spin qubits, a crucial step for quantum error correction. This breakthrough demonstrates the potential of silicon for building powerful quantum processors.

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Area of Science:

  • Quantum computing
  • Solid-state physics
  • Quantum information science

Background:

  • Silicon spin qubits are promising for quantum information processing.
  • Previous research lacked demonstrations of high-fidelity state preparation, readout, and multi-qubit gates necessary for quantum error correction.

Purpose of the Study:

  • To demonstrate high-fidelity state preparation and readout.
  • To achieve high-fidelity single- and two-qubit gates.
  • To quantitatively characterize a two-qubit Si/SiGe quantum processor.

Main Methods:

  • Utilized a two-qubit silicon-germanium (Si/SiGe) quantum processor.
  • Employed gate set tomography and randomized benchmarking for quantitative characterization.

Main Results:

  • Achieved state preparation and readout fidelity greater than 97%.
  • Demonstrated single- and two-qubit gate fidelities exceeding 99%.
  • Quantitatively validated processor performance.

Conclusions:

  • Silicon spin qubits show significant potential for quantum error correction.
  • The demonstrated fidelities pave the way for developing intermediate-scale quantum processors.
  • Silicon-based quantum technology is a leading candidate for future quantum computers.