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arXiv · 2510.17692

Twinned Dynamical Decoupling

Nayden P. Nedev·Nikolay V. Vitanov
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Abstract

Systematic pulse-area errors limit the fidelity of quantum control across many qubit platforms. We introduce twinned dynamical decoupling (TDD), an analytic family of sequences $T2n$ in which a pulse sequence is paired with its $\pi$-phase-shifted twin. This $\pi$-phase step cancels common-mode systematic pulse-area errors to all orders on exact resonance. Then the phases of the pulses in each of the constituent twins are determined in such a manner that detuning errors are suppressed to the highest possible order as well. We have derived a simple analytic formula for these phases applicable to arbitrary sequence length. We demonstrate the sequences with superconducting transmon qubits on the IBM Quantum processor ibm$\_$torino and the IQM Quantum processor Garnet. The measured population plateaus agree closely with theory and show enhanced robustness compared to the most frequently used dynamical decoupling protocols.

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Nayden P. Nedev, Nikolay V. Vitanov. 2025-10-20. Twinned Dynamical Decoupling. https://arxiv.org/abs/2510.17692

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