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.