Observation of multi-component atomic Schrödinger cat states of up to 20 qubits

Chao Song, Kai Xu, Hekang Li +13

We report on deterministic generation of 18-qubit genuinely entangled Greenberger-Horne-Zeilinger (GHZ) state and multi-component atomic Schrödinger cat states of up to 20 qubits o…