## Ising Hamiltonian Formulation of Boolean Operations and Gates

D-Wave Systems Inc. builds annealing devices that exhibit quantum effects. These devices as well as other physical systems implement a programmable Ising model of the form.

\begin{equation}

H = \sum_i c_i Z_i+\sum_{ ij} c_{ij}Z_iZ_j

\end{equation} […]