Spin glass
The key feature of the quantum annealer is that it finds preferentially configurations which are close to the global energy minimum of the phase space. As a first illustration how to determine the low temperature thermodynamics from these configurations, we use a spin glass37,38 with random couplings, which is given by the Hamiltonian
$$\begin{aligned} H = \sum _{i<j} J_{ij} s_i s_j + \sum _i h_i s_i \end{aligned}$$
(1)
with \(N=20\) spins \(s_i=\pm 1\) and random values for the coupling constants, \(J_{ij}, h_i\in…
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