Robustness of Highly Entangled Multi-Qubit States Under Decoherence

Details Robustness of Highly Entangled Multi-Qubit States Under Decoherence Robustness of Highly Entangled Multi-Qubit States Under Decoherence

2008-06-04

arxiv.org/abs/0806.0779v3

Phys. Rev. A 79, 022108 (2009)

Physics

Quantum Physics

16 pages, 3 figures. Changes in Sec. 3

Scientific paper

10.1103/PhysRevA.79.022108

We investigate the decay of entanglement, due to decoherence, of multi-qubit systems that are initially prepared in highly (in some cases maximally) entangled states. We assume that during the decoherence processes each qubit of the system interacts with its own, independent environment. We determine, for systems with a small number of qubits and for various decoherence channels, the initial states exhibiting the most robust entanglement. We also consider a restricted version of this robustness optimization problem, only involving states equivalent under local unitary transformations to the |GHZ> state.

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