Growing demand for high-speed Ising-computing-specific hardware has prompted a need for determining how the accuracy depends on a hardware implementation with physically limited resources.
To optimize the accuracy-efficiency trade-off, this study focuses on the Hopfield model with discrete coupling.
The order parameter equations of the Hopfield model with discrete coupling are derived using the replica method.
The relationship between the number of bits representing the coupling strength and the critical memory capacity is clarified.