Evolution equation of entanglement for multi-qubit systems
Quantum Physics
2010-12-30 v1
Abstract
We discuss entanglement evolution of a multi-qubit system when one of its qubits is subjected to a general noisy channel. For such a system, an evolution equation of entanglement for a lower bound for multi-qubit concurrence is derived. Using this evolution equation, the entanglement dynamics of an initially mixed three-qubit state composed of a GHZ and a W state is analyzed if one of the qubits is affected by a phase, an amplitude or a generalized amplitude damping channel.
Cite
@article{arxiv.1011.5348,
title = {Evolution equation of entanglement for multi-qubit systems},
author = {Michael Siomau and Stephan Fritzsche},
journal= {arXiv preprint arXiv:1011.5348},
year = {2010}
}
Comments
3 figures, 28 references