Fig. 2: Fundamental p-gates implemented with a biased coupled OPO network.
From: Stochastic logic in biased coupled photonic probabilistic bits
a Truth table of the AND-gate. b Corresponding Ising Hamiltonian with three spins. c All possible spin configurations of the Hamiltonian depicted in b with their corresponding energy E. The ground states reproduce the correct logic from the truth table. d–f We plot the occupation probability of all possible states (meaning all possible combinations of the spin state represented by the phase of the OPO steady state) as a function of cavity round trips. The color denotes whether the state is a ground state (green) or an excited state (orange) of the corresponding Ising Hamiltonian.
