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arXiv 1302.4897quant-phcond-mat.quant-gas
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光晶格中玻色子的空间纠缠

Spatial entanglement of bosons in optical lattices

M. Cramer, A. Bernard, N. Fabbri, L. Fallani, C. Fort, S. Rosi, F. Caruso, M. Inguscio, M. B. Plenio

摘要:

纠缠是量子信息处理的基本资源,在低温下自然发生在多体系统中。纠缠的存在,特别是它与系统分区大小的缩放,是量子多体态复杂性的基础。在多体系统中纠缠的定量估计是一个重大挑战,因为它需要全状态层析成像,在系统大小上按指数缩放,或者假设未经验证的系统特性,如其哈密顿量或温度。在这里,我们采用最近开发的方法来确定严格的低纠缠边界从容易获得的测量和应用它们的实验中的超冷相互作用玻色子在光晶格约$10^5$网站。然后,我们研究的行为的空间纠缠的网站时,穿越超流-莫特绝缘体过渡和温度变化时。这构成了第一个严格的实验大规模纠缠量化在一个可扩展的量子模拟器。

英文摘要:

Entanglement is a fundamental resource for quantum information processing, occurring naturally in many-body systems at low temperatures. The presence of entanglement and, in particular, its scaling with the size of system partitions underlies the complexity of quantum many-body states. The quantitative estimation of entanglement in many-body systems represents a major challenge as it requires either full state tomography, scaling exponentially in the system size, or the assumption of unverified system characteristics such as its Hamiltonian or temperature. Here we adopt recently developed approaches for the determination of rigorous lower entanglement bounds from readily accessible measurements and apply them in an experiment of ultracold interacting bosons in optical lattices of approximately $10^5$ sites. We then study the behaviour of spatial entanglement between the sites when crossing the superfluid-Mott insulator transition and when varying temperature. This constitutes the first rigorous experimental large-scale entanglement quantification in a scalable quantum simulator.

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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