Genuine fidelity gaps associated with a sequential decomposition of genuinely entangling isometry and unitary operations

  title={Genuine fidelity gaps associated with a sequential decomposition of genuinely entangling isometry and unitary operations},
  author={Hamed Saberi},
  journal={Physical Review A},
  • H. Saberi
  • Published 3 June 2013
  • Mathematics
  • Physical Review A
We draw attention to the existence of “genuine” fidelity gaps in an ancilla-assisted sequential decomposition of genuinely entangling isometry and unitary operations of quantum computing. The gaps arise upon a bipartite decomposition of a multiqubit operation in a one-way sequential recipe in which an ancillary system interacts locally and only once with each qubit in a row. Given the known “no-go” associated with such a theoretically and experimentally desirable decomposition, various figures… 

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