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arXiv quant-ph/0609101quant-phcond-mat.othercond-mat.soft
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光晶格中的任意子编织

Anyonic Braiding in Optical Lattices

Chuanwei Zhang, V. W. Scarola, Sumanta Tewari, S. Das Sarma

摘要:

物质的拓扑量子态,无论是阿贝尔的还是非阿贝尔的,其特征在于激发,当一个激发围绕另一个激发移动(编织)时,其波函数经历非平凡的统计变换。拓扑量子计算提出利用非阿贝尔拓扑态的拓扑保护和编织统计来进行量子计算。拓扑量子计算的巨大技术前景为实验观测拓扑态提供了新的动力。在这里,我们明确制定了一个现实的实验方案,创建和编织的阿贝尔拓扑激发Kitaev模型建立在一个可调的鲁棒系统,冷原子光晶格。我们还演示了如何检测这些激励的关键特征,他们的编织统计。对这种统计的观测将直接确定任意子的存在,即既不是费米子也不是玻色子的量子粒子。除了建立拓扑物质,我们在这里开发的实验方案也可以适应于非阿贝尔拓扑状态,由相同的Kitaev模型支持,但在不同的参数制度,最终建立拓扑保护的量子门。

英文摘要:

Topological quantum states of matter, both Abelian and non-Abelian, are characterized by excitations whose wavefunctions undergo non-trivial statistical transformations as one excitation is moved (braided) around another. Topological quantum computation proposes to use the topological protection and the braiding statistics of a non-Abelian topological state to perform quantum computation. The enormous technological prospect of topological quantum computation provides new motivation for experimentally observing a topological state. Here we explicitly work out a realistic experimental scheme to create and braid the Abelian topological excitations in the Kitaev model built on a tunable robust system, a cold atom optical lattice. We also demonstrate how to detect the key feature of these excitations, their braiding statistics. Observation of this statistics would directly establish the existence of anyons, quantum particles which are neither fermions nor bosons. In addition to establishing topological matter, the experimental scheme we develop here can also be adapted to a non-Abelian topological state, supported by the same Kitaev model but in a different parameter regime, to eventually build topologically protected quantum gates.

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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