Quantum networks self-test all entangled states

Certifying quantum properties with minimal assumptions is a fundamental problem in information science. Self-testing method to infer the underlying physics of experiment only from measured statistics1,2. Although all bipartite pure entangled states can be self-tested3, little known about how self-test an arbitrary number systems. Here we introduce framework network-assisted self-testing and use it any state The scheme requires preparation singlets that scales linearly systems, implementation standard projective Bell measurements, feasible current technology4. When network constraints are exploited, obtained certification stronger than what achievable Bell-type scenario. Our work shows properly designed networks offer new opportunities for phenomena. Quantum systems produce correlations cannot mimicked by classical resources, which used certify without trusting devices. A perform this procedure