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We show that continuous dynamical decoupling can protect a two-qubitentangled state from sudden death at finite temperature due to uncorrelateddephasing, bit flipping, and dissipation. We consider a situation where anentangled state shared between two non-interacting qubits is initially preparedand left evolve under the environmental perturbations and the protection ofexternal fields. To illustrate the protection of the entanglement, we solvenumerically a master equation in the Born approximation, consideringindependent boson fields at the same temperature coupled to the different erroragents of each qubit.

Protection of entanglement from sudden death using continuous dynamical decoupling