• Corpus ID: 222133411

R\'enyi Entropy, Signed Probabilities, and the Qubit

  title={R\'enyi Entropy, Signed Probabilities, and the Qubit},
  author={Adam Brandenburger and Pierfrancesco La Mura and Stuart Zoble},
  journal={arXiv: Quantum Physics},
The states of the qubit, the basic unit of quantum information, are $2\times2$ positive semi-definite Hermitian matrices with trace $1$. We characterize these states in terms of an entropic uncertainty principle formulated on an eight-point phase space. 

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