Evolution equation of entanglement for multi-qubit systems

Details Evolution equation of entanglement for multi-qubit systems Evolution equation of entanglement for multi-qubit systems

2010-11-24

arxiv.org/abs/1011.5348v1

M.Siomau and S.Fritzsche, Phys. Rev. A 82, 062327 (2010)

Physics

Quantum Physics

3 figures, 28 references

Scientific paper

10.1103/PhysRevA.82.062327

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.

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