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Reduced Sensitivity to Charge Noise in Semiconductor Spin Qubits via Symmetric Operation

1 min read

Demonstrates that operating a semiconductor double-dot spin qubit in a symmetric barrier-control configuration strongly suppresses charge-noise sensitivity while preserving fast exchange control. This paper is the clean experimental anchor for why modern exchange gates prefer barrier tuning over detuning-heavy pulses.

Key Results

  • Introduces symmetric operation as a practical route to lower (\partial J/\partial \epsilon) in semiconductor spin qubits
  • Shows exchange oscillations with substantially improved robustness to charge noise
  • Clarifies the control distinction between barrier tuning and detuning tuning for exchange gates
  • Establishes symmetric exchange control as a key design pattern for high-fidelity spin-qubit operation

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