Dynamical Suppression of Decoherence in Two-Qubit Quantum Memory  

作　　者：LIU Xiao-Shu 

机构地区：[1]Department of Physics, Tsinghua University, Beijing 100084, China [2]Key Laboratory for Quantum Information and Measurements, Beijing 100084, China

出　　处：《Communications in Theoretical Physics》2005年第3X期459-462,共4页理论物理通讯（英文版）

基　　金：国家重点基础研究发展计划(973计划)，国家自然科学基金

摘　　要：In this paper, we have detailedly studied the dynamical suppression of the phase damping for the two-qubit quantum memory of Ising model by the quantum "bang-bang" technique. We find the sequence of periodic radiofrequency pulses repetitively to flip the state of the two-qubit system and quantitatively find that these pulses can be used to effectively suppress the phase damping decoherence of the quantum memory and freeze the system state into its initial state. The general sequence of periodic radio-frequency pulses to suppress the phase damping of multi-qubit of Ising model is also given.

关 键 词：decoherence suppression quantum memory bang-bang technique Ising model 

分 类 号：O413[理学—理论物理]