The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 24 2 2024 08 22 Dynamics of Quantum Coherence and Hilbert-Schmidt Speed of V-Type Three-level Atom in Anisotropic Photonic Crystal Dynamics of Quantum Coherence and Hilbert-Schmidt Speed of V-Type Three-level Atom in Anisotropic Photonic Crystal 245 254 3525 10.47176/ijpr.24.2.21850 FA S.Nafise Mousavi Institute for Advanced Studies in Basic Sciences (IASBS), Department of Physics, Zanjan, Iran 0009-0002-6741-2475 Ghasem Naeimi Islamic Azad University, Qazvin Branch, Department of Physics, Qazvin, Iran 0000-0002-4030-8881 Shahpoor Saeidian Institute for Advanced Studies in Basic Sciences (IASBS), Department of Physics, Zanjan, Iran Ghafar Ahmadi Institute for Advanced Studies in Basic Sciences (IASBS), Department of Physics, Zanjan, Iran Journal Article 2024 02 16 In this paper, the time evolution of quantum coherence and Hilbert-Schmidt speed, as a criterion to measure the memory of the quantum system, of a V-type three-level atom embedded in an anisotropic photonic crystal are investigated. The effect of the different relative positions of the upper levels from the forbidden gap and the initial relative phase values on the mentioned quantum features are studied.<strong> </strong>We show that the photonic band gap crystal, as a structured environment, significantly influences the preservation and enhancement of these quantum features. The photonic gap band materials have non-Markovian properties and offer a new approach as a basic solution in overcoming the decoherence problem and subsequently in problems related to quantum information. In this paper, the time evolution of quantum coherence and Hilbert-Schmidt speed, as a criterion to measure the memory of the quantum system, of a V-type three-level atom embedded in an anisotropic photonic crystal are investigated. The effect of the different relative positions of the upper levels from the forbidden gap and the initial relative phase values on the mentioned quantum features are studied.<strong> </strong>We show that the photonic band gap crystal, as a structured environment, significantly influences the preservation and enhancement of these quantum features. The photonic gap band materials have non-Markovian properties and offer a new approach as a basic solution in overcoming the decoherence problem and subsequently in problems related to quantum information. https://ijpr.iut.ac.ir/article_3525_da9e6a4a4aeca98588e4dd77ceb37695.pdf