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arXiv 1105.4466cond-mat.quant-gascond-mat.str-elquant-ph
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用超晶格势测量光晶格中的自旋关联

Measuring spin correlations in optical lattices using superlattice potentials

K. G. L. Pedersen, B. M. Andersen, G. M. Bruun, O. F. Syljuasen, A. S. Sorensen

摘要:

提出了两种利用超晶格势研究光晶格中原子的短程和长程自旋关联的实验方法。第一种方法是通过占据新的振动基态,将基础晶格的周期性绝热加倍,以探测费米子(玻色子)的邻近单重态(三重态)相关性。第二种方法利用时间依赖的超晶格势产生自旋相关的运输由任何数量的规定的晶格站点,并探测器的相关性所产生的双重占用的网站的数量。对于实验相关参数,我们演示了这两种方法如何产生大的签名的反铁磁(AF)的相关性强排斥费米子原子在一个Single Shot的实验。最后,我们展示了如何这种方法也可以应用于探测d-波配对,一个可能的基态候选人的掺杂排斥哈伯德模型。

英文摘要:

We suggest two experimental methods for probing both short- and long-range spin correlations of atoms in optical lattices using superlattice potentials. The first method involves an adiabatic doubling of the periodicity of the underlying lattice to probe neighboring singlet (triplet) correlations for fermions (bosons) by the occupation of the new vibrational ground state. The second method utilizes a time-dependent superlattice potential to generate spin-dependent transport by any number of prescribed lattice sites, and probes correlations by the resulting number of doubly occupied sites. For experimentally relevant parameters, we demonstrate how both methods yield large signatures of antiferromagnetic (AF) correlations of strongly repulsive fermionic atoms in a single shot of the experiment. Lastly, we show how this method may also be applied to probe d-wave pairing, a possible ground state candidate for the doped repulsive Hubbard model.

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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