Fig. 3: Multipoint correlators.
From: Formation of individual stripes in a mixed-dimensional cold-atom Fermi–Hubbard system
a, Illustration of pair–hole, pair–pair and hole–hole–hole correlator, in which a pair is defined as a nearest-neighbour pair of holes along y. b,c, Symmetrized correlation map of the pair–hole (pair–pair) correlator. We find an attraction of the pairs along y, which points towards the formation of larger-scale structures. Above the map, the average over dy (\(\bar{\,{g}^{(2)}}\)) hints at the existence of another charge structure at dx = 4. Error bars are estimated using bootstrapping and are smaller than the marker size if not visible. d, In the symmetrized, connected three-point hole–hole–hole correlator with dh = (0, 1), we observe a positive signal at nearest neighbours along y, which indicates the existence of longer charge structures beyond pairs of two holes (see Supplementary Information for statistical significance). The data are evaluated over the hole doping distribution as given in the Supplementary Information.
