  We propose a robust and efficient approach for tripartite-to-bipartite
entanglement localization. By using weak measurements and quantum measurement
reversal, an almost maximal entangled state shared by two parties can be
generated with the assistance of the third party by local quantum operations
and classical communication from a W-like state. We show that this approach
works well in the presence of losses and phase diffusion. Our method provides
an active way to fight against decoherence, and might help for quantum
communication and distributed quantum computation.
