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- W4387156905 abstract "We demonstrate an order of magnitude reduction in the sensitivity to optical crosstalk for neighboring trapped-ion qubits during simultaneous single-qubit gates driven with individual addressing beams. Gates are implemented via two-photon Raman transitions, where crosstalk is mitigated by offsetting the drive frequencies for each qubit to avoid first-order crosstalk effects from inter-beam two-photon resonance. The technique is simple to implement, and we find that phase-dependent crosstalk due to optical interference is reduced on the most impacted neighbor from a maximal fractional rotation error of 0.185(4) without crosstalk mitigation to $leq$ 0.006 with the mitigation strategy. Further, we characterize first-order crosstalk in the two-qubit gate and avoid the resulting rotation errors for the arbitrary-axis M{o}lmer-S{o}rensen gate via a phase-agnostic composite gate. Finally, we demonstrate holistic system performance by constructing a composite CNOT gate using the improved single-qubit gates and phase-agnostic two-qubit gate. This work is done on the Quantum Scientific Computing Open User Testbed (QSCOUT); however, our methods are widely applicable for individual-addressing Raman gates and impose no significant overhead, enabling immediate improvement for quantum processors that incorporate this technique." @default.
- W4387156905 created "2023-09-30" @default.
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- W4387156905 date "2023-09-26" @default.
- W4387156905 modified "2023-09-30" @default.
- W4387156905 title "First-Order Crosstalk Mitigation in Parallel Quantum Gates Driven With Multi-Photon Transitions" @default.
- W4387156905 doi "https://doi.org/10.48550/arxiv.2309.15342" @default.
- W4387156905 hasPublicationYear "2023" @default.
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