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arXiv 1504.04397cond-mat.quant-gasphysics.atom-ph
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光晶格中费米锂-6的位分辨成像

Site-resolved Imaging of Fermionic Lithium-6 in an Optical Lattice

Maxwell F. Parsons, Florian Huber, Anton Mazurenko, Christie S. Chiu, Widagdo Setiawan, Katherine Wooley-Brown, Sebastian Blatt, Markus Greiner

摘要:

我们演示了在二维光晶格中单个费米子锂-6原子的位置分辨成像。为了在荧光成像过程中保持密度分布,我们同时用3D拉曼边带冷却原子。这种激光冷却技术,在这里首次展示了锂-6原子,也提供了一种途径,以快速低熵填充的光晶格。我们能够以> 95%的保真度确定单个晶格位置的占据,从而能够直接局部测量费米晶格系统中的粒子相关性。这种能力将有助于创造和研究费米-哈伯德模型的低温相,包括反铁磁体和d波超流性。

英文摘要:

We demonstrate site-resolved imaging of individual fermionic lithium-6 atoms in a 2D optical lattice. To preserve the density distribution during fluorescence imaging, we simultaneously cool the atoms with 3D Raman sideband cooling. This laser cooling technique, demonstrated here for the first time for lithium-6 atoms, also provides a pathway to rapid low-entropy filling of an optical lattice. We are able to determine the occupation of individual lattice sites with a fidelity >95%, enabling direct, local measurement of particle correlations in Fermi lattice systems. This ability will be instrumental for creating and investigating low-temperature phases of the Fermi-Hubbard model, including antiferromagnets and d-wave superfluidity.

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