Cooling and entangling ultracold atoms in optical lattices

doi:10.1126/science.aaz6801

GSTDTAP > 气候变化

DOI	10.1126/science.aaz6801
	Cooling and entangling ultracold atoms in optical lattices
	Bing Yang; Hui Sun; Chun-Jiong Huang; Han-Yi Wang; Youjin Deng; Han-Ning Dai; Zhen-Sheng Yuan; Jian-Wei Pan
	2020-07-31
发表期刊	Science
出版年	2020
英文摘要	Atoms loaded in an optical lattice can convincingly mimic the behavior of electrons in solids. However, reaching very low temperatures, where the most interesting quantum phases are expected to occur, is tricky. Yang et al. introduced a clever experimental technique to reduce the entropy of their sample. They created an array consisting of alternating rows of sample atoms and reservoirs. The entropy was transferred from the sample atoms to the adjacent reservoirs, which were then removed. The resulting low-entropy system can be used as a basis for quantum simulation and information. Science , this issue p. [550][1] Scalable, coherent many-body systems can enable the realization of previously unexplored quantum phases and have the potential to exponentially speed up information processing. Thermal fluctuations are negligible and quantum effects govern the behavior of such systems with extremely low temperature. We report the cooling of a quantum simulator with 10,000 atoms and mass production of high-fidelity entangled pairs. In a two-dimensional plane, we cool Mott insulator samples by immersing them into removable superfluid reservoirs, achieving an entropy per particle of 1.9−0.4+1.7×10−3kB. The atoms are then rearranged into a two-dimensional lattice free of defects. We further demonstrate a two-qubit gate with a fidelity of 0.993 ± 0.001 for entangling 1250 atom pairs. Our results offer a setting for exploring low-energy many-body phases and may enable the creation of large-scale entanglement. [1]: /lookup/doi/10.1126/science.aaz6801
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/286868
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Bing Yang,Hui Sun,Chun-Jiong Huang,et al. Cooling and entangling ultracold atoms in optical lattices[J]. Science,2020.
APA	Bing Yang.,Hui Sun.,Chun-Jiong Huang.,Han-Yi Wang.,Youjin Deng.,...&Jian-Wei Pan.(2020).Cooling and entangling ultracold atoms in optical lattices.Science.
MLA	Bing Yang,et al."Cooling and entangling ultracold atoms in optical lattices".Science (2020).