Transducer leakage error suppression using invariant-based shortcut
- URL: http://arxiv.org/abs/2607.14175v1
- Date: Wed, 15 Jul 2026 12:31:13 GMT
- Title: Transducer leakage error suppression using invariant-based shortcut
- Abstract summary: We present a method for suppressing transducer leakage errors in spin-superconducting hybrid quantum systems.<n>The fidelity of the population of the final state features a broad range above 99% under the influence of leakage error.
- Score: 2.5887412510708954
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We present a method for suppressing transducer leakage errors in spin-superconducting hybrid quantum systems with the theory of optimal invariant-based shortcut. By mediated virtual photons as a transducer to exchange the energy between the spin qubit and a transmon qubit, the fidelity of the population of the final state features a broad range above 99\% under the influence of leakage error. The leakage probability from computational subspace to non-computational subspace can be effectively suppressed at a lowest value with $0.01$. Based on the optimized pulse control designed by the invariant-based inverse engineering, the high-fidelity quantum iSWAP gate operations and entanglement state preparation within the computational subspace are achieved. {Compared to the traditional $π$ pulse, derivative removal by adiabatic gate, counter-diabatic shortcut schemes, and limited-memory Broyden-Fletcher-Goldfarb-Shanno gradient ascent pulse engineering, the optimized shortcut scheme can still achieve a high fidelity with 99\% in the presence of decoherence and control error.} When taking into account the possibility of leakage errors in actual situations, our solution can still largely resist the influence of control errors. The results provides a feasible path for precisely manipulating the quantum state of hybrid quantum systems.
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