Long-Range ZZ Interaction via Resonator-Induced Phase in Superconducting Qubits
Xiang Deng, Wen Zheng, Xudong Liao, Haoyu Zhou, Yangyang Ge, Jie Zhao, Dong Lan, Xinsheng Tan, Yu Zhang, Shaoxiong Li, Yang Yu
DOI 10.1103/PhysRevLett.134.020801 · Physical Review Letters
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
Superconducting quantum computing emerges as one of the leading candidates for achieving quantum advantage. However, a prevailing challenge is the coding overhead due to limited quantum connectivity, constrained by nearest-neighbor coupling among superconducting qubits. Here, we propose a novel multimode coupling scheme using three resonators driven by two microwaves, based on the resonator-induced phase gate, to extend the ZZ interaction distance between qubits. We demonstrate a controlled-Z (cz) gate fidelity exceeding 99.9% within 160 ns at a free spectral range (FSR) of 1.4 GHz, and by optimizing driving pulses, we further reduce the residual photon to nearly 10−3 within 100 ns at a FSR of 0.2 GHz. These facilitate the long-range cz gate over separations reaching submeters, thus significantly enhancing qubit connectivity and making a practical step toward the scalable integration and modularization of quantum processors. Specifically, our approach supports the implementation of quantum error correction codes requiring high connectivity, such as low-density parity check codes that pave the way to achieving fault-tolerant quantum computing.
Similar papers
High-Fidelity, High-Scalability Two-Qubit Gate Scheme for Superconducting Qubits
similarity 0.92Yuan Xu et al.
Source status unknown — claims are unverified
Remote entangling gates for spin qubits in quantum dots using a charge-sensitive superconducting coupler
similarity 0.91Harry Hanlim Kang et al.
Source status unknown — claims are unverified
Direct Implementation of High-Fidelity Three-Qubit Gates for Superconducting Processor with Tunable Couplers
similarity 0.91Hao-Tian Liu et al.
Source status unknown — claims are unverified
High-performance multiqubit system with double-transmon couplers: Toward scalable superconducting quantum computers
similarity 0.89Kentaro Kubo et al.
Source status unknown — claims are unverified
Superconducting Integrated On-Demand Quantum Memory with Microwave Pulse Preservation
similarity 0.89Aleksei R. Matanin et al.
Source status unknown — claims are unverified
Landau-Zener-Stückelberg interference of microwave-dressed states of a superconducting phase qubit
similarity 0.89Guozhu Sun et al.
Source status unknown — claims are unverified