Masking Quantum Information Encoded in Pure and Mixed States

  title={Masking Quantum Information Encoded in Pure and Mixed States},
  author={Huaixin Cao and Yu Du and Zhihua Guo and Kanyuan Han and Chuan Yang},
  journal={arXiv: Quantum Physics},
Masking of quantum information means that information is hidden from a subsystem and spread over a composite system. Modi et al. proved in [Phys. Rev. Lett. 120, 230501 (2018)] that this is true for some restricted sets of nonorthogonal quantum states and it is not possible for arbitrary quantum states. In this paper, we discuss the problem of masking quantum information encoded in pure and mixed states, respectively. Based on an established necessary and sufficient condition for a set of pure… 

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