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arXiv 1012.5016quant-ph
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高速空间多模原子存储器

High speed spatially multimode atomic memory

T. Golubeva, Yu. Golubev, O. Mishina, A. Bramati, J. Laurat, E. Giacobino

摘要:

研究了原子系综中多模超短光脉冲的相干存储和提取。我们考虑了一个量子存储过程的基础上的信号脉冲转换成一个长寿命的自旋相干通过轻物质相互作用的非共振λ型系统。为了研究写入和读取过程,我们解析地求解描述场和原子相干性在时间和空间中的演化的偏微分方程。我们展示了如何优化写作和阅读的过程。如果介质长度是固定的,则对于每个长度,存在脉冲持续时间的最佳值。我们讨论了这种存储方案的信息容量,我们估计的横模的数量,可以存储为量子全息图。

英文摘要:

We study the coherent storage and retrieval of a very short multimode light pulse in an atomic ensemble. We consider a quantum memory process based on the conversion of a signal pulse into a long-lived spin coherence via light matter interaction in an on-resonant Lambda-type system. In order to study the writing and reading processes we analytically solve the partial differential equations describing the evolution of the field and of the atomic coherence in time as well as in space. We show how to optimize the process for writing as well as for reading. If the medium length is fixed, for each length, there is an optimal value of the pulse duration. We discuss the information capacity of this memory scheme and we estimate the number of transverse modes that can be stored as a quantum hologram.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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