Realization of fast all-microwave CZ gates with a tunable coupler
arXiv:2202.06616 · doi:10.1088/0256-307X/39/3/030302
Abstract
The development of high-fidelity two-qubit quantum gates is essential for digital quantum computing. Here, we propose and realize an all-microwave parametric Controlled-Z (CZ) gates by coupling strength modulation in a superconducting Transmon qubit system with tunable couplers. After optimizing the design of the tunable coupler together with the control pulse numerically, we experimentally realized a 100 ns CZ gate with high fidelity of 99.38%0.34% and the control error being 0.1%. We note that our CZ gates are not affected by pulse distortion and do not need pulse correction, {providing a solution for the real-time pulse generation in a dynamic quantum feedback circuit}. With the expectation of utilizing our all-microwave control scheme to reduce the number of control lines through frequency multiplexing in the future, our scheme draws a blueprint for the high-integrable quantum hardware design.
References in corpus (4)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Surface codes: Towards practical large-scale quantum computation
- Randomized Benchmarking of Quantum Gates
- Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform
Cited by in corpus (5)
- High-precision pulse calibration of tunable couplers for high-fidelity two-qubit gates in superconducting quantum processors
- In situ Qubit Frequency Tuning Circuit for Scalable Superconducting Quantum Computing: Scheme and Experiment
- Parametric phase modulation in superconducting circuits
- Distributed-HISQ: A Distributed Quantum Control Architecture
- Optimizing Circuit Reusing and its Application in Randomized Benchmarking