光学超晶格中利用相互作用阻塞计数原子
Counting atoms using interaction blockade in an optical superlattice
摘要：
我们报道了在光晶格中观察到的超冷原子的相互作用阻塞效应，类似于在介观固态系统中观察到的库仑阻塞。当晶格位置被转换成偏置双井，我们检测到一组离散的步骤在井人口增加偏置电位。这些对应于隧穿共振，其中势垒每一侧的原子数逐个改变。这使我们能够计算和控制给定阱中的原子数量。通过评估不同平台的幅度，我们可以完全确定的原子在晶格中的数量分布，我们证明了超流和莫特绝缘制度的情况下，87 Rb。
英文摘要：
We report on the observation of an interaction blockade effect for ultracold atoms in optical lattices, analogous to Coulomb blockade observed in mesoscopic solid state systems. When the lattice sites are converted into biased double wells, we detect a discrete set of steps in the well population for increasing bias potentials. These correspond to tunneling resonances where the atom number on each side of the barrier changes one by one. This allows us to count and control the number of atoms within a given well. By evaluating the amplitude of the different plateaus, we can fully determine the number distribution of the atoms in the lattice, which we demonstrate for the case of a superfluid and Mott insulating regime of 87Rb.
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