Complex self-testing equals uniqueness of real parts of higher moments, reformulated in real C* algebras, with a quaternion strategy providing the first standard self-test for a genuinely complex non-local strategy.
Christiano, Urmila Mahadev, Umesh V
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Beyond real: Investigating the role of complex numbers in self-testing
Complex self-testing equals uniqueness of real parts of higher moments, reformulated in real C* algebras, with a quaternion strategy providing the first standard self-test for a genuinely complex non-local strategy.