Three-mode tunable coupler for superconducting two-qubit gates
Elena Yu. Egorova, Alena S. Kazmina, Ilya A. Simakov, Ilya N. Moskalenko, Nikolay N. Abramov, Daria A. Kalacheva, Viktor B. Lubsanov, Alexey N. Bolgar, Nataliya Maleeva, Ilya S. Besedin
DOI 10.1103/2h4m-mg2p · Physical Review Applied
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Building a scalable, universal, high-performance quantum processor is a formidable challenge. In particular, the problem of realizing fast, high-performance two-qubit gates of high fidelity has yet to be addressed. Here, we propose a building block for a scalable quantum processor consisting of two transmons and a tunable three-mode coupler allowing for ZZ interaction control. We experimentally demonstrate a native cz gate with a pulse duration of 60 ns, achieving a two-qubit gate fidelity above 98%, limited mostly by the qubit coherence time. Numerical simulations show that by optimizing the gate duration, the fidelity can be pushed over 99.97%.
Similar papers
Direct Implementation of High-Fidelity Three-Qubit Gates for Superconducting Processor with Tunable Couplers
similarity 0.93Hao-Tian Liu et al.
Source status unknown — claims are unverified
Fast microwave-driven three-qubit gates for cavity-coupled superconducting qubits
similarity 0.93Edwin Barnes et al.
Source status unknown — claims are unverified
Efficient two-qutrit gates in superconducting circuits using parametric coupling
similarity 0.93Mahadevan Subramanian & Adrian Lupascu
Source status unknown — claims are unverified
All-Microwave Manipulation of Superconducting Qubits with a Fixed-Frequency Transmon Coupler
similarity 0.93Shotaro Shirai et al.
Source status unknown — claims are unverified
Microwave-activated high-fidelity three-qubit gate scheme for fixed-frequency superconducting qubits
similarity 0.93Kui Zhao et al.
Source status unknown — claims are unverified
Double-Transmon Coupler: Fast Two-Qubit Gate with No Residual Coupling for Highly Detuned Superconducting Qubits
similarity 0.92Hayato Goto
Source status unknown — claims are unverified