Research output: Contribution to journal › Article › peer-review

Journal | Journal of Physics A: Mathematical and General |
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Date | Published - 2 Dec 2005 |

Issue number | 48 |

Volume | 38 |

Number of pages | 15 |

Pages (from-to) | 10377-10391 |

Original language | English |

The partial scaling transform of the density matrix for multiqubit states is introduced to detect entanglement of the quantum state. The transform contains partial transposition as a special case. The scaling transform corresponds to partial time scaling of a subsystem (or partial Planck constant scaling) which was recently used to formulate a separability criterion for continuous variables. A measure of entanglement which is a generalization of negativity measure is introduced being based on tomographic probability description of spin states.

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