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The time evolution of quantum Fisher information, quantum coherence, andnon-Markovianity of a V-type three-level atom embedded in free space or aphotonic band gap crystal have been investigated. It has been demonstrated thatthe photonic band gap crystal, as a structured environment, significantlyinfluences the preservation and enhancement of these quantum features.Additionally, we observe that by manipulating the initial relative phase valuesencoded in the atomic state and the relative positions of the upper levelswithin the forbidden gap, control over the dynamics of quantum features can beachieved. These findings highlight the potential benefits of utilizing photonicband gap crystals in quantum systems, offering improved preservation andmanipulation of quantum information. The ability to control quantum featuresopens new avenues for applications in quantum information processing andrelated technologies.

Dynamics of Quantum Coherence and Quantum Fisher Information of a V-type Atom in Isotropic Photonic Crystal