Long-lived quantum memory
Long-lived quantum memory
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DOI：
10.1038/nphys1152
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发表时间：
2009-02-01
期刊：
影响因子：
19.6
通讯作者：
Kuzmich, A.
中科院分区：
文献类型：
--
作者：
Zhao, R.;Dudin, Y. O.;Kuzmich, A.
用于存储和检索量子信息的量子存储器对环境影响非常敏感，这限制了它们的存储时间。原子和离子的基态是量子记忆的潜在候选者，但是尽管已经证明原子（1,2）的相干时间为几秒，离子（3-5）的相干时间为数百秒，但单量子激发的长时间存储和检索仍然是一个突出的挑战。在这里，我们报道了一种量子存储器，它利用了原子铷在一维光学晶格中的磁不敏感时钟跃迁。我们观察到量子存储器的寿命超过6毫秒，比以前报道的长两个多数量级(6)。这一进展是实现远距离量子网络和控制产生物质和光的复杂纠缠态的重要一步。
Quantum memories for the storage and retrieval of quantum information are extremely sensitive to environmental influences, which limits their storage times. The ground states of atoms and ions are potential candidates for quantum memories, but although coherence times of the order of a few seconds for atoms(1,2) and hundreds of seconds for ions(3-5) have been demonstrated, long-lived storage and retrieval of single quantum excitations remains an outstanding challenge. Here, we report a quantum memory using the magnetically insensitive clock transition in atomic rubidium confined in a one-dimensional optical lattice. We observe quantum memory lifetimes exceeding 6 ms, more than two orders of magnitude longer than previously reported(6). This advance is an important step towards the realization of long-distance quantum networks and the controlled production of complex entangled states of matter and light.