The Ising model is traditionally used in statistical mechanics. Variables are “spin up” (↑) and “spin down” (↓), states that correspond to +1 and −1 values. Relationships between the spins, represented by couplings, are correlations or anti-correlations. The objective function expressed as an Ising model is as follows:

where the linear coefficients corresponding to qubit biases are *h_i*, and the quadratic coefficients corresponding to coupling strengths are *J_i,j*.

See also What is a Binary Quadratic Model (BQM)?

## Comments

Please sign in to leave a comment.