Enhancing the nonlocal advantage of quantum coherence by local parity-time (PT)-symmetric operation

In this letter, we explore the dynamics and protection of nonlocal advantage of quantum coherence (NAQC) for an entangled two-qubit system subjected to a noisy environment by performing parity-time (PT) symmetric operations on one of the two particles. For comparison, we investigate the protection of Bell nonlocality, quantum coherence, and entanglement by local PT-symmetric operations. Here, we show that the NAQC, Bell nonlocality, quantum coherence, and entanglement of a bipartite entangled state can be improved effectively by the local PT-symmetric operation and verify that the protection effect is better with the increase of PT-symmetric operation strength. (letter)