Anupam Madhukar, Jiefei Zhang, et al.
MRS Spring/Fall Meeting 2020
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.
Anupam Madhukar, Jiefei Zhang, et al.
MRS Spring/Fall Meeting 2020
Samuele Piccinelli, Francesco Tacchino, et al.
QSim 2025
S. Thomas, P. Tomasini, et al.
Thin Solid Films
André Melo, Nathan Earnest-Noble, et al.
Quantum