Protection of entanglement from sudden death using continuous dynamical decoupling

Details Protection of entanglement from sudden death using continuous dynamical decoupling Protection of entanglement from sudden death using continuous dynamical decoupling

2007-07-27

arxiv.org/abs/0707.4092v2

Physical Review A 76, 062306 (2007)

Physics

Quantum Physics

Scientific paper

We show that continuous dynamical decoupling can protect a two-qubit entangled state from sudden death at finite temperature due to uncorrelated dephasing, bit flipping, and dissipation. We consider a situation where an entangled state shared between two non-interacting qubits is initially prepared and left evolve under the environmental perturbations and the protection of external fields. To illustrate the protection of the entanglement, we solve numerically a master equation in the Born approximation, considering independent boson fields at the same temperature coupled to the different error agents of each qubit.

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