Measures of operator entanglement of two-qubit gates
Quantum Physics
2015-05-28 v1
Abstract
Two different measures of operator entanglement of two-qubit gates, namely, Schmidt strength and linear entropy, are studied. While these measures are shown to have one-to-one relation between them for Schmidt number 2 class of gates, no such relation exists for Schmidt number 4 class, implying that the measures are inequivalent in general. Further, we establish a simple relation between linear entropy and local invariants of two-qubit gates. The implication of the relation is discussed.
Keywords
Cite
@article{arxiv.1106.4139,
title = {Measures of operator entanglement of two-qubit gates},
author = {S. Balakrishnan and R. Sankaranarayanan},
journal= {arXiv preprint arXiv:1106.4139},
year = {2015}
}
Comments
Regular article