Realization of High-Fidelity Perfect Entanglers between Remote Superconducting Quantum Processors
Juan Song, Shuang Yang, Pei Liu, Hui-Li Zhang, Guang-Ming Xue, Zhen-Yu Mi, Wen-Gang Zhang, Fei Yan, Yi-Rong Jin, Hai-Feng Yu
DOI 10.1103/npr7-b7kq · 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 qubit systems, one of the leading candidates for universal quantum computing, face scalability challenges such as frequency crowding, wiring complexity, and packaging problems. Distributed quantum computing offers a viable strategy for constructing larger quantum information processing systems. Yet, direct universal quantum gates between remote qubits—critical to distributed architectures—remain unrealized. Here, we demonstrate direct high-fidelity entangling gates between two remote superconducting quantum processors separated by a 30 cm distance, utilizing standing-wave modes in their connecting coaxial cable. We achieve cross-entropy benchmarking fidelities of (99.15±0.02)% and (98.03±0.04)% for the controlled-not and controlled-z gates, respectively, outperforming state transfer and feedback-based protocols in fidelity and efficiency. This advancement significantly enhances the prospect of universal distributed quantum information processing, which is the critical step toward future large-scale quantum systems.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Microwave Quantum Link between Superconducting Circuits Housed in Spatially Separated Cryogenic Systems
similarity 0.95P. Magnard et al.
Source status unknown — claims are unverified
Fast Tunable Coupler for Superconducting Qubits
similarity 0.95R. C. Bialczak et al.
Source status unknown — claims are unverified
Digital Coherent Control of a Superconducting Qubit
similarity 0.95E. Leonard, Jr. et al.
Source status unknown — claims are unverified
Quantized levitation states of superconducting multiple-ring systems
similarity 0.95Stephen B. Haley & Herman J. Fink
Source status unknown — claims are unverified
Mitigating losses of superconducting qubits strongly coupled to defect modes
similarity 0.94Dante Colao Zanuz et al.
Source status unknown — claims are unverified
Rapid on-demand generation of thermal states in superconducting quantum circuits
similarity 0.94Timm Mörstedt et al.
Source status unknown — claims are unverified