Qubit-qudit states with positive partial transpose

@article{Chen2012QubitquditSW,
  title={Qubit-qudit states with positive partial transpose},
  author={Lin Chen and Dragomir Z. Djokovic},
  journal={Physical Review A},
  year={2012},
  volume={86}
}
  • Lin Chen, Dragomir Z. Djokovic
  • Published 2012
  • Physics, Mathematics
  • Physical Review A
  • We show that the length of a qubit-qutrit separable state is equal to the max(r,s), where r is the rank of the state and s is the rank of its partial transpose. We refer to the ordered pair (r,s) as the birank of this state. We also construct examples of qubit-qutrit separable states of any feasible birank (r,s). We determine the closure of the set of normalized two-qutrit entangled states of rank four having positive partial transpose (PPT). The boundary of this set consists of all separable… CONTINUE READING

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