Dmitri Maslov, Jin-Sung Kim, et al.
APS March Meeting 2021
The ability to generate and verify multipartite entanglement is an important benchmark for near-term quantum devices. We develop a scalable entanglement metric based on multiple quantum coherences and demonstrate experimentally on a 20-qubit superconducting device. We report a state fidelity of 0.5165±0.0036 for an 18-qubit GHZ state, indicating multipartite entanglement across all 18 qubits. Our entanglement metric is robust to noise and only requires measuring the population in the ground state; it can be readily applied to other quantum devices to verify multipartite entanglement.
Dmitri Maslov, Jin-Sung Kim, et al.
APS March Meeting 2021
Oscar Wallis, Stefano Mensa, et al.
QCE 2025
Eric Zhang, Srikanth Srinivasan, et al.
APS March Meeting 2021
Luke Govia, David McKay, et al.
APS March Meeting 2024