Protection of Two-Qubit Entanglement by the Quantum Erasing Effect

We present a scheme to save the entanglement of two spatially separated atoms, each located in a leaky cavity, through the quantum erasing method. It is shown that no matter whether the two atoms are in the pure or mixed state, one can robustly save their initial entanglement even if the number of erasing events is finite. We also briefly discuss the challenging aspect of implementing such a scheme.