Fig. 1
From: Simulation of a Rohksar–Kivelson ladder on a NISQ device
(a) Schematic representation of the RK ladder. Green arrows indicate the spin-1/2 particles associated to each link of the ladder. Note that for the horizontal links we employ the notation \(\rightarrow\) (\(\leftarrow\)) to indicate spin \(\uparrow\) (\(\downarrow\)). The orange arrows denote virtual links, which we employ to define the local Gauss law at each lattice vertex (see text). The green spins are placed in the AVAVAV configuration, which we consider as the initial state in our simulations. (b) Application of the ring-exchange operator \(U_{\square _{\textbf{n}}}\) over the spins of plaquette \(\square _{\textbf{n}}\).
