Enhancing entanglement trapping by weak measurement and quantum measurement reversal

•Propose a scheme to enhance entanglement trapping in photonic band gap material.•Weak measurement and its reversal are performed locally on individual qubits.•Obtain an optimal condition for maximizing the concurrence of entanglement trapping.•Entanglement sudden death can be prevented by weak measurement in photonic band gap.

In this paper, we propose a scheme to enhance trapping of entanglement of two qubits in the environment of a photonic band gap material. Our entanglement trapping promotion scheme makes use of combined weak measurements and quantum measurement reversals. The optimal promotion of entanglement trapping can be acquired with a reasonable finite success probability by adjusting measurement strengths.