A parametric oscillator oscillates a plurality of pseudo spin pulses SPi having mutually an identical oscillation frequency by using parametric oscillation, an interaction implementing unit performs feedback implementation of a magnitude and a sign of interaction related to each pseudo spin pulse SPi (the proportionality coefficient λi+ΣJijσj+ΣKijkσjσk with respect to σi) by using a tentative measurement result of oscillation phases φi(tentative) of the plurality of pseudo spin pulses SPi, and a pseudo spin measuring unit measures the pseudo spins σi of the plurality of pseudo spin pulses SPi, based on a final measurement result of oscillation phases φi(steady) of the plurality of pseudo spin pulses SPi.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. An Ising model quantum computation device comprising: a parametric oscillator that parametrically oscillates a plurality of pseudo spin pulses, the plurality of pseudo spin pulses being in correspondence with a plurality of Ising model spins in a pseudo manner and having mutually an identical oscillation frequency; a ring resonator in which the plurality of pseudo spin pulses circularly propagate; a tentative spin measuring unit that tentatively measures phases of the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in the ring resonator to tentatively measure pseudo spins of the plurality of pseudo spin pulses; an interaction computing unit that tentatively computes interaction related to a certain pseudo spin pulse based on a coupling coefficient of the Ising model related to the certain pseudo spin pulse and a pseudo spin of other pseudo spin pulse having been tentatively measured by the tentative spin measuring unit; an interaction implementing unit that controls amplitudes and phases of light injected to the certain pseudo spin pulse to tentatively implement a magnitude and a sign of the interaction related to the certain pseudo spin pulse, the certain pseudo spin pulse having been tentatively computed by the interaction computing unit; and a pseudo spin measuring unit that measures the phases of the plurality of pseudo spin pulses after the plurality of pseudo spin pulses have arrived at a steady state in a process of repeating a feedback loop configured of the tentative spin measuring unit, the interaction computing unit, and the interaction implementing unit to measure the pseudo spins of the plurality of pseudo spin pulses. 2. The Ising model quantum computation device according to claim 1, wherein the interaction computing unit tentatively computes interaction of three or more bodies related to the certain pseudo spin pulse, based on a coupling coefficient of three or more bodies of the Ising model related to the certain pseudo spin pulse and the pseudo spin of the other pseudo spin pulse having been tentatively measured by the tentative spin measuring unit, and the interaction implementing unit controls the amplitudes and the phases of light injected to the certain pseudo spin pulse to tentatively implement a magnitude and a sign of the interaction of three or more bodies related to the certain pseudo spin pulse, the certain pseudo spin pulse having been tentatively computed by the interaction computing unit. 3. The Ising model quantum computation device according to claim 1, wherein the parametric oscillator parametrically oscillates a plurality of local oscillation pulses having an oscillation frequencies identical to the oscillation frequencies of the plurality of pseudo spin pulses, the plurality of local oscillation pulses pairing with the plurality of pseudo spin pulses one-on-one, the ring resonator in which the plurality of local oscillation pulses circularly propagate, the Ising model quantum computation device further includes a pulse-phase equalizing unit that equalizes phases of the plurality of local oscillation pulses from a state including both positive phases and negative phases to a state including one of positive phases and negative phases, the tentative spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using a part of the plurality of local oscillation pulses that pair with the plurality of pseudo spin pulses one-on-one, the interaction implementing unit injects local oscillation pulses that pair with the certain pseudo spin pulses one-on-one and the part of which have the controlled amplitudes and phases, to the certain pseudo spin pulses, and the pseudo spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using a part of the plurality of local oscillation pulses that pair with the plurality of pseudo spin pulses one-on-one. 4. The Ising model quantum computation device according to claim 1, further comprising: a pulse generator that generates a local oscillation pulse having an angular frequency ω; and a second harmonic generator that generates a pulse having an angular frequency 2ω by using the local oscillation pulse having the angular frequency ω, wherein the parametric oscillator parametrically oscillates the plurality of pseudo spin pulses by using the pulse having the angular frequency 2ω, the tentative spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using the local oscillation pulse having the angular frequency ω, the interaction implementing unit injects the local oscillation pulse having the angular frequency ω with a controlled amplitude and phase, to the certain pseudo spin pulse, and the pseudo spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using the local oscillation pulse having the angular frequency ω. 5. The Ising model quantum computation device according to claim 1, wherein the interaction implementing unit controls the amplitude of light injected to the certain pseudo spin pulse larger at an initial stage of a computation process and smaller at a terminal stage of the computation process. 6. The Ising model quantum computation device according to claim 1, further comprising a tentative amplitude measuring unit that tentatively measures amplitudes of the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in the ring resonator, wherein the parametric oscillator performs feedback control for amplitude of a pump pulse used for parametric oscillation such that the amplitudes of the plurality of pseudo spin pulses become equal based on the amplitudes of the plurality of pseudo spin pulses having been measured by the tentative amplitude measuring unit. 7. An Ising model quantum parallel computation device comprising: n-th Ising model quantum computation device according to claim 1 where n-th group (n is an integer equal to or more than one) of pseudo spin pulses in correspondence with n-th group of spins in a pseudo manner among the plurality of Ising model spins circularly propagate in the ring resonator; and a tentative spin sharing unit that shares information of pseudo spins of the n-th group of pseudo spin pulses among the Ising model quantum computation devices included in parallel, the n-th group of pseudo spin pulses having been tentatively measured by the tentative spin measuring unit in the n-th Ising model quantum computation device. 8. An Ising model quantum computation method comprising: a parametric oscillating step of parametrically oscillating a plurality of pseudo spin pulses, the plurality of pseudo spin pulses being in correspondence with a plurality of Ising model spins in a pseudo manner and having mutually an identical oscillation frequency; a tentative spin measuring step of tentatively measuring phases of the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in a ring resonator to tentatively measure pseudo spins of the plurality of pseudo spin pulses; an interaction computing step of tentatively computing interaction related to a certain pseudo spin pulse based on a coupling coefficient of the Ising model related to the certain pseudo spin pulse and a pseudo spin of other pseudo spin pulse having been tentatively measured by the tentative spin measuring step every time the plurality of pseudo spin pulses circularly propagate in the ring resonator; an interaction implementing step of controlling an amplitude and a phase of light injected to the certain pseudo spin pulse every time the plurality of pseudo spin pulses circularly propagate in the ring resonator to tentatively implement a magnitude and a sign of the interaction related to the certain pseudo spin pulse, the certain pseudo spin pulse having been tentatively computed by the interaction computing step; a parametric amplifying step of parametrically amplifying the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in the ring resonator; and a pseudo spin measuring step of measuring the phases of the plurality of pseudo spin pulses after the plurality of pseudo spin pulses have arrived at a steady state in a process of repeating a feedback loop including the tentative spin measuring step, the interaction implementing step, and the parametric amplifying step in this order to measure the pseudo spins of the plurality of pseudo spin pulses. 9. An Ising model quantum computation method comprising: a parametric oscillating step of parametrically oscillating a plurality of pseudo spin pulses, the plurality of pseudo spin pulses being in correspondence with a plurality of Ising model spins in a pseudo manner and having mutually an identical oscillation frequency; a tentative spin measuring step of tentatively measuring phases of the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in a ring resonator to tentatively measure pseudo spins of the plurality of pseudo spin pulses; an interaction computing step of tentatively computing interaction related to a certain pseudo spin pulse based on a coupling coefficient of the Ising model related to the certain pseudo spin pulse and a pseudo spin of other pseudo spin pulse having been tentatively measured by the tentative spin measuring step every time the plurality of pseudo spin pulses circularly propagate in the ring resonator; a parametric amplifying step of parametrically amplifying the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in the ring resonator; an interaction implementing step of controlling an amplitude and a phase of light injected to the certain pseudo spin pulse every time the plurality of pseudo spin pulses circularly propagate in the ring resonator to tentatively implement a magnitude and a sign of the interaction related to the certain pseudo spin pulse, the certain pseudo spin pulse having been tentatively computed by the interaction computing step; and a pseudo spin measuring step of measuring the phases of the plurality of pseudo spin pulses after the plurality of pseudo spin pulses have arrived at a steady state in a process of repeating a feedback loop including the tentative spin measuring step, the parametric amplifying step, and the interaction implementing step in this order to measure the pseudo spins of the plurality of pseudo spin pulses. 10. The Ising model quantum computation device according to claim 2, wherein the parametric oscillator parametrically oscillates a plurality of local oscillation pulses having an oscillation frequencies identical to the oscillation frequencies of the plurality of pseudo spin pulses, the plurality of local oscillation pulses pairing with the plurality of pseudo spin pulses one-on-one, the ring resonator in which the plurality of local oscillation pulses circularly propagate, the Ising model quantum computation device further includes a pulse-phase equalizing unit that equalizes phases of the plurality of local oscillation pulses from a state including both positive phases and negative phases to a state including one of positive phases and negative phases, the tentative spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using a part of the plurality of local oscillation pulses that pair with the plurality of pseudo spin pulses one-on-one, the interaction implementing unit injects local oscillation pulses that pair with the certain pseudo spin pulses one-on-one and the part of which have the controlled amplitudes and phases, to the certain pseudo spin pulses, and the pseudo spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using a part of the plurality of local oscillation pulses that pair with the plurality of pseudo spin pulses one-on-one. 11. The Ising model quantum computation device according to claim 2, further comprising: a pulse generator that generates a local oscillation pulse having an angular frequency ω; and a second harmonic generator that generates a pulse having an angular frequency 2ω by using the local oscillation pulse having the angular frequency ω, wherein the parametric oscillator parametrically oscillates the plurality of pseudo spin pulses by using the pulse having the angular frequency 2ω, the tentative spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using the local oscillation pulse having the angular frequency ω, the interaction implementing unit injects the local oscillation pulse having the angular frequency ω with a controlled amplitude and phase, to the certain pseudo spin pulse, and the pseudo spin measuring unit performs homodyne detection for a part of the plurality of pseudo spin pulses by using the local oscillation pulse having the angular frequency ω. 12. The Ising model quantum computation device according to claim 2, wherein the interaction implementing unit controls the amplitude of light injected to the certain pseudo spin pulse larger at an initial stage of a computation process and smaller at a terminal stage of the computation process. 13. The Ising model quantum computation device according to claim 2, further comprising a tentative amplitude measuring unit that tentatively measures amplitudes of the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in the ring resonator, wherein the parametric oscillator performs feedback control for amplitude of a pump pulse used for parametric oscillation such that the amplitudes of the plurality of pseudo spin pulses become equal based on the amplitudes of the plurality of pseudo spin pulses having been measured by the tentative amplitude measuring unit. 14. An Ising model quantum parallel computation device comprising: n-th Ising model quantum computation device according to claim 2 where n-th group (n is an integer equal to or more than one) of pseudo spin pulses in correspondence with n-th group of spins in a pseudo manner among the plurality of Ising model spins circularly propagate in the ring resonator; and a tentative spin sharing unit that shares information of pseudo spins of the n-th group of pseudo spin pulses among the Ising model quantum computation devices included in parallel, the n-th group of pseudo spin pulses having been tentatively measured by the tentative spin measuring unit in the n-th Ising model quantum computation device. 15. The Ising model quantum computation device according to claim 3, wherein the interaction implementing unit controls the amplitude of light injected to the certain pseudo spin pulse larger at an initial stage of a computation process and smaller at a terminal stage of the computation process. 16. The Ising model quantum computation device according to claim 3, further comprising a tentative amplitude measuring unit that tentatively measures amplitudes of the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in the ring resonator, wherein the parametric oscillator performs feedback control for amplitude of a pump pulse used for parametric oscillation such that the amplitudes of the plurality of pseudo spin pulses become equal based on the amplitudes of the plurality of pseudo spin pulses having been measured by the tentative amplitude measuring unit. 17. An Ising model quantum parallel computation device comprising: n-th Ising model quantum computation device according to claim 3 where n-th group (n is an integer equal to or more than one) of pseudo spin pulses in correspondence with n-th group of spins in a pseudo manner among the plurality of Ising model spins circularly propagate in the ring resonator; and a tentative spin sharing unit that shares information of pseudo spins of the n-th group of pseudo spin pulses among the Ising model quantum computation devices included in parallel, the n-th group of pseudo spin pulses having been tentatively measured by the tentative spin measuring unit in the n-th Ising model quantum computation device. 18. The Ising model quantum computation device according to claim 4, wherein the interaction implementing unit controls the amplitude of light injected to the certain pseudo spin pulse larger at an initial stage of a computation process and smaller at a terminal stage of the computation process. 19. The Ising model quantum computation device according to claim 4, further comprising a tentative amplitude measuring unit that tentatively measures amplitudes of the plurality of pseudo spin pulses every time the plurality of pseudo spin pulses circularly propagate in the ring resonator, wherein the parametric oscillator performs feedback control for amplitude of a pump pulse used for parametric oscillation such that the amplitudes of the plurality of pseudo spin pulses become equal based on the amplitudes of the plurality of pseudo spin pulses having been measured by the tentative amplitude measuring unit. 20. An Ising model quantum parallel computation device comprising: n-th Ising model quantum computation device according to claim 4 where n-th group (n is an integer equal to or more than one) of pseudo spin pulses in correspondence with n-th group of spins in a pseudo manner among the plurality of Ising model spins circularly propagate in the ring resonator; and a tentative spin sharing unit that shares information of pseudo spins of the n-th group of pseudo spin pulses among the Ising model quantum computation devices included in parallel, the n-th group of pseudo spin pulses having been tentatively measured by the tentative spin measuring unit in the n-th Ising model quantum computation device.