Quantum Secret Sharing Rates
For quantum cryptography researchers, this work provides foundational capacity bounds for QSS, though it is incremental as it adapts classical secret sharing rate analysis to the quantum setting.
This paper establishes the capacity limits for quantum secret sharing (QSS), providing a regularized characterization and determining the exact capacity for QSS under dephasing noise.
This paper studies the capacity limits for quantum secret sharing (QSS). The goal of a QSS scheme is to distribute a quantum secret among multiple participants, such that only authorized parties can recover it through collaboration, while no information can be obtained without such collaboration. We introduce an information-theoretic model for the rate analysis of QSS and its relation to compound quantum channels, following a similar approach as of Zou et al. (2015) on classical secret sharing. We establish a regularized characterization for the QSS capacity, and determine the capacity for QSS with dephasing noise.