Stroboscopically Robust Gates For Capacitively Coupled Singlet-Triplet Qubits

Author/Creator ORCID

Date

2018-10-09

Department

Program

Citation of Original Publication

R. K. L. Colmenar, J. P. Kestner , Stroboscopically Robust Gates For Capacitively Coupled Singlet-Triplet Qubits, Condensed Matter, Mesoscale and Nanoscale Physics, 2018, https://arxiv.org/abs/1810.04208

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Abstract

Recent work on Ising-coupled double-quantum-dot spin qubits in GaAs with voltage-controlled exchange interaction has shown improved two-qubit gate fidelities from the application of oscillating exchange along with a strong magnetic field gradient between adjacent dots. By examining how noise propagates in the time-evolution operator of the system, we find an optimal set of parameters that provide passive stroboscopic circumvention of errors in two-qubit gates to first order. We predict over 99% two-qubit gate fidelities in the presence of quasistatic and 1/f noise, which is an order of magnitude improvement over the typical unoptimized implementation.