Cryogenic InGaAs HEMT-Based Switches For Quantum Signal Routing
Alberto Ferraris, Eunjung Cha, et al.
IEDM 2022
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.
Alberto Ferraris, Eunjung Cha, et al.
IEDM 2022
Chung-Hsun Lin, R. Kambhampati, et al.
VLSI Technology 2012
Zhihao Xiao, Archana Kamal, et al.
APS March Meeting 2023
Alexis Schotte, Guanyu Zhu, et al.
APS March Meeting 2021