Ising Model Calculation Device

1 . An Ising model calculation device for computing a generalized Ising model expressed by a Hamiltonian having a magnetic field term, the Ising model calculation device configured to:

apply a magnetic field to spins of state monitoring light pulses;

measure amplitudes of the obtained state monitoring light pulses to monitor a state of the magnetic field term; and

monitor an operation state of the Ising model calculation device as a coherent Ising machine.

2 . The Ising model calculation device according to claim 1 , wherein

the magnetic field applied to the state monitoring light pulses is a magnetic field having amplitude values forming a slope dependent on time slots, and the magnetic field is applied to cross a zero point of the magnetic field.

3 . The Ising model calculation device according to claim 1 , wherein

the magnetic field applied to the state monitoring light pulses is constant value.

4 . The Ising model calculation device according to claim 1 , wherein

the magnetic field applied to the state monitoring light pulses is proportional to an absolute value of measured amplitudes of the state monitoring light pulses.

5 . The Ising model calculation device according to claim 1 , further configured to:

fit a specific fitting function to the measured amplitudes of the state monitoring light pulses; and

using an obtained value of a fitting parameter, select a calculation result of the Ising model calculation device as a coherent Ising machine.

6 . The Ising model calculation device according to claim 1 , further configured to:

determine an average amplitude value of the measured amplitudes of the state monitoring light pulses; and

using the average amplitude value, select a calculation result of the Ising model calculation device as a coherent Ising machine.

7 . (canceled)