Probabilistic entanglement transformation by local overlap modification

We present a strategy to transform the entanglement of two qubits under a local unitary-reduction process. Such procedure modifies the overlap between two pure states involved in a specific representation of the initial bipartite pure state. We study the scopes of the proposal and present a concrete scheme of experimental realization by using cold ions confined in linear Paul traps.

► Probabilistic transformation of entanglement via local overlap modification. ► Entanglement can be increased with the upper bound success probability. ► Entanglement can be decreased deterministically. ► An experimental implementation considering cold ions is proposed.