文章基本信息

标题：Environment spectrum and coherence behaviours in a rare-earth doped crystal for quantum memory
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作者：Bo Gong ; Tao Tu ; Zhong-Quan Zhou 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2017
卷号：7
期号：1
页码：18030
DOI：10.1038/s41598-017-18229-6
语种：English
出版社：Springer Nature
摘要：We theoretically investigate the dynamics of environment and coherence behaviours of the central ion in a quantum memory based on a rare-earth doped crystal. The interactions between the central ion and the bath spins suppress the flip-flop rate of the neighbour bath spins and yield a specific environment spectral density S(ω). Under dynamical decoupling pulses, this spectrum provides a general scaling for the coherence envelope and coherence time, which significantly extend over a range on an hour-long time scale. The characterized environment spectrum with ultra-long coherence time can be used to implement various quantum communication and information processing protocols.