Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 21 2 2021 08 23 Excitation transfer in a three-site spin chain; global vs local approach Excitation transfer in a three-site spin chain; global vs local approach 365 376 1701 10.47176/ijpr.21.2.21177 FA L Memarzadeh Department of Physics, Sharif University of Technology, Tehran, Iran Journal Article 2020 12 23 We study excitation transfer in a spin chain in presence of noise. To model noise, we assume that each ‎qubit of the spin chain is interacting with a Bosonic environment and has Markovian evolution. ‎We derive the explicit form of master equation both in global and local approaches. Comparing the ‎results of each approach, we discuss the noise effect on excitation transfer and in addition to that we ‎show that the results of local approach are not a limiting case of global approach‎.‎‎ We study excitation transfer in a spin chain in presence of noise. To model noise, we assume that each ‎qubit of the spin chain is interacting with a Bosonic environment and has Markovian evolution. ‎We derive the explicit form of master equation both in global and local approaches. Comparing the ‎results of each approach, we discuss the noise effect on excitation transfer and in addition to that we ‎show that the results of local approach are not a limiting case of global approach‎.‎‎ open quantum systems transfer in spin chain https://ijpr.iut.ac.ir/article_1701_ad08122331dffb7a869cb52d0f3f6667.pdf