Paul M. Solomon, Isaac Lauer, et al.
IEEE Electron Device Letters
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.
Paul M. Solomon, Isaac Lauer, et al.
IEEE Electron Device Letters
Dan Rugar
APS March Meeting 2022
Moein Malekakhlagh, William Shanks, et al.
Physical Review A
Aaron Finck, Santino Carnevale, et al.
APS March Meeting 2021