Fig. 4 | npj Quantum Information

Fig. 4

From: Experimental demonstration of robust self-testing for bipartite entangled states

Fig. 4

Self-testing of high-dimensional bipartite states. Through a [{3, d}, {4, d}] Bell experiment, totally 10 pure states are self-tested. Approximately, |ψ0〉 is a maximally entangled two-qudit state, and |ψ1,2,3,4〉 are transformations of it through local unitary operations. |ψ5,6,7〉 are partially entangled two-qudit states, and |ψ8〉 is a partially entangled two-qutrit states, while |ψ9〉 is close to a product state. Each state is self-tested into a close pure target state of which the four coefficients are shown in the histogram. The actual fidelity FT of each tested state to its target state is also shown. For all the tested states, FT is above 0.95, indicating the ability to infer the Schmidt coefficients of high-dimensional entangled states through self-testing

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