Characterization of entanglement in multiqubit systems via spin squeezing
Abstract
Quantum entanglement reflects itself through non-local correlations among the subsystems of a quantum system. This thesis focuses on constructing a complete set of local invariants characterizing symmetric two qubit systems and analyzing the pairwise entanglement properties like collective spin squeezing - exhibited by multiqubits - in terms of two qubit entanglement invariants. Further, the collective pairwise entanglement properties of symmetric multiqubit states are shown to be captured entirely by the off diagonal block of the covariance matrix.
Cite
@article{arxiv.0809.5147,
title = {Characterization of entanglement in multiqubit systems via spin squeezing},
author = {M. S. Uma},
journal= {arXiv preprint arXiv:0809.5147},
year = {2009}
}
Comments
Ph.D. thesis (127 pages, 2 figures, Latex), Bangalore University, India. Advisor: A. R. Usha Devi. The main results are also available in arXiv:quant-ph/0509015, arXiv:quant-ph/0509056 and arXiv:quant-ph/0601035