Computing local invariants of qubit systems

M. Grassl; M. Roetteler; T. Beth

DOI:10.1103/PhysRevA.58.1833

Corpus ID: 15892529

Computing local invariants of qubit systems

@article{Grassl1998ComputingLI,
  title={Computing local invariants of qubit systems},
  author={M. Grassl and M. Roetteler and T. Beth},
  journal={Physical Review A},
  year={1998},
  volume={58},
  pages={1833-1839}
}

M. Grassl, M. Roetteler, T. Beth

Published 1998

Physics

Physical Review A

We investigate means to describe the nonlocal properties of quantum systems and to test if two quantum systems are locally equivalent. For this we consider quantum systems that consist of several subsystems, especially multiple quantum bits, i.e., systems consisting of subsystems of dimension 2. We compute invariant polynomials, i.e., polynomial functions of the entries of the density operator that are invariant under local unitary operations. As an example, we consider a system of two quantum… CONTINUE READING

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