Self-testing using only marginal information
Xinhui Li, Yu Ping Cai, Yun-Guang Han, Qiaoyan Wen, Valerio Scarani · Physical Review A · 2018
The partial states of a multipartite quantum state may carry a lot of information: in some cases, they determine the global state uniquely. This result is known for tomographic information, that is for fully characterized measurements. We extend it to the device-independent framework by exhibiting sets of two-party correlations that self-test pure three-qubit states.