Partial scaling transform of multiqubit states as a criterion of separability
Quantum Physics
2007-05-23 v1
Abstract
The partial scaling transform of the density matrix for multiqubit states is introduced to detect entanglement of quantum states. The transform contains partial transposition as a special case. The scaling transform corresponds to partial time scaling of subsystem (or partial Planck's constant scaling) which was used to formulate recently separability criterion for continous variables.A measure of entanglement which is a generalization of negativity measure is introduced being based on tomographic probability description of spin states.
Cite
@article{arxiv.quant-ph/0509006,
title = {Partial scaling transform of multiqubit states as a criterion of separability},
author = {C. Lupo and V. Man'ko and G. Marmo and E. C. G. Sudarshan},
journal= {arXiv preprint arXiv:quant-ph/0509006},
year = {2007}
}
Comments
16 pages, 5 figures, submitted to J. Phys. A: Math. Gen