A postselected model of non-Hermitian superconducting qubits reaches GHZ and GHZ-class states of three and four qubits with fidelity above 0.99 under strong driving or strong all-to-all coupling.
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High-fidelity multipartite entanglement creation in non-Hermitian qubits
A postselected model of non-Hermitian superconducting qubits reaches GHZ and GHZ-class states of three and four qubits with fidelity above 0.99 under strong driving or strong all-to-all coupling.