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arXiv 1806.01758quant-phcond-mat.quant-gas
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在中性原子量子模拟器中探测幺正两时间关联

Probing unitary two-time correlations in a neutral atom quantum simulator

Philipp Uhrich, Christian Gross, Michael Kastner

摘要:

一般来说,测量幺正演化的量子力学两时间关联是具有挑战性的。在最近的一篇论文[P。Uhrich { \em等人},物理学\修订版~ A { \bf 96},022127(2017)],已经指出该任务的相当大的简化发生在自旋- $1/2$晶格模型中,将这种测量带入这种模型的最先进或不久的将来的量子模拟器的范围内。在这里,我们讨论了在量子气体显微镜或微阱阵列的两个时间相关的测量方案的实验实施的挑战。我们提出了一个修改后的测量协议,减轻这些挑战,我们严格估计的准确性的协议,通过Lieb-Robinson界限。在这些界限的基础上,我们确定了一个参数制度,其中所提出的协议允许准确测量所需的两个时间的相关性。

英文摘要:

Measuring unitarily-evolved quantum mechanical two-time correlations is challenging in general. In a recent paper [P.~Uhrich {\em et al.}, Phys.\ Rev.~A {\bf 96}, 022127 (2017)], a considerable simplification of this task has been pointed out to occur in spin-$1/2$ lattice models, bringing such measurements into reach of state-of-the-art or near-future quantum simulators of such models. Here we discuss the challenges of an experimental implementation of measurement schemes of two-time correlations in quantum gas microscopes or microtrap arrays. We propose a modified measurement protocol that mitigates these challenges, and we rigorously estimate the accuracy of the protocols by means of Lieb-Robinson bounds. On the basis of these bounds we identify a parameter regime in which the proposed protocols allow for accurate measurements of the desired two-time correlations.

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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