Patents by Inventor Shoko Utsunomiya
Shoko Utsunomiya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230153677Abstract: In order to address an issue that an unsolved problem is caused in a conventional coherent Ising machine in which a term, which expresses a magnetic field at each site, is not able to be implemented, the present invention provides an Ising model calculation device comprising a push-pull-type optical modulator in which a role corresponding to “a local magnetic field” can be implemented by adjusting an operation point. The calculation device of the present disclosure is characterized by implementing an item, which expresses a magnetic field, at each site by adding, to the conventional coherent Ising machine, a function for simulating the magnetic field item. Specifically, light having the amplitude of a predetermined sign is input in the conventional coherent Ising machine by dislocating an operation point of the push-pull-type optical modulator.Type: ApplicationFiled: April 2, 2021Publication date: May 18, 2023Inventors: Hiroki Takesue, Takahiro Inagaki, Toshimori Honjo, Kensuke Inaba, Shoko Utsunomiya, Shuhei Tamate
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Patent number: 10139703Abstract: In an Ising spin measuring step, measurement is suspended after one set of measurement of all Ising spins {?i} is completed before another set of measurement of all Ising spins {?i} is restarted. In an Ising interaction computing step, all Ising interactions relating to all the Ising spins ?i can be computed with a sufficient time margin on the basis of most recent measurement of Ising spins ?i, after one set of measurement of all the Ising spins {?i} is completed before another set of measurement of all the Ising spins {?i} is restarted by the Ising spin measuring step.Type: GrantFiled: September 14, 2016Date of Patent: November 27, 2018Assignees: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION RESEARCH ORGANIZATION OF INFORMATION AND SYSTEMS, OSAKA UNIVERSITYInventors: Takahiro Inagaki, Hiroki Takesue, Toshimori Honjo, Shoko Utsunomiya, Yoshihisa Yamamoto, Yoshitaka Haribara, Shuhei Tamate, Koji Igarashi
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Patent number: 10140580Abstract: 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 ?i+?Jij?j+?Kijk?j?k with respect to ?i) by using a tentative measurement result of oscillation phases ?i(tentative) of the plurality of pseudo spin pulses SPi, and a pseudo spin measuring unit measures the pseudo spins ?i of the plurality of pseudo spin pulses SPi, based on a final measurement result of oscillation phases ?i(steady) of the plurality of pseudo spin pulses SPi.Type: GrantFiled: March 25, 2015Date of Patent: November 27, 2018Assignees: Inter-University Research Institute Corporation, Research Organization of Information and Systems, NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko Utsunomiya, Yoshihisa Yamamoto, Hiroki Takesue
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Publication number: 20180268315Abstract: In the present invention, a parametric oscillator 1 oscillates a plurality of pseudo spin pulses SPi having mutually an identical oscillation frequency by using parametric oscillation, an interaction implementing unit 5 performs feedback implementation of a magnitude and a sign of interaction related to each pseudo spin pulse SPi (the proportionality coefficient ?i+?Jij?j+?Kijk?j?k with respect to ?i) by using a tentative measurement result of oscillation phases ?i (tentative) of the plurality of pseudo spin pulses SPi, and a pseudo spin measuring unit 6 measures the pseudo spins ?i of the plurality of pseudo spin pulses SPi, based on a final measurement result of oscillation phases ?i (steady) of the plurality of pseudo spin pulses SPi.Type: ApplicationFiled: March 25, 2015Publication date: September 20, 2018Inventors: Shoko UTSUNOMIYA, Yoshihisa YAMAMOTO, Hiroki TAKESUE
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Publication number: 20180246393Abstract: In an Ising spin measuring step, measurement is suspended after one set of measurement of all Ising spins {?i} is completed before another set of measurement of all Ising spins {?i} is restarted. In an Ising interaction computing step, all Ising interactions relating to all the Ising spins ?i can be computed with a sufficient time margin on the basis of most recent measurement of Ising spins ?i, after one set of measurement of all the Ising spins {?i} is completed before another set of measurement of all the Ising spins {?i} is restarted by the Ising spin measuring step.Type: ApplicationFiled: September 14, 2016Publication date: August 30, 2018Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Inter-University Research Institute Corporation Research Organization of Information and Systems, OSAKA UNIVERSITYInventors: Takahiro INAGAKI, Hiroki TAKESUE, Toshimori HONJO, Shoko UTSUNOMIYA, Yoshihisa YAMAMOTO, Yoshitaka HARIBARA, Shuhei TAMATE, Koji IGARASHI
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Patent number: 9830555Abstract: In one aspect, a computational machine includes an optical device configured to receive energy from an optical energy source and generate a number N1 of optical signals, and a number N2 of coupling devices, each of which controllably couples a plurality of the number N1 optical signals. The coupling devices are individually controlled to simulate a computational problem. In another aspect, a computational machine includes a number N1 of parametric oscillators and a number N2 of coupling devices, each of which controllably couples a plurality of the number N1 of parametric oscillators together. The coupling devices are individually controlled to simulate a computational problem.Type: GrantFiled: July 9, 2014Date of Patent: November 28, 2017Assignees: The Board of Trustees of the Leland Stanford Junior University, Inter-University Research Institute Corporation, Research Organization of Information and SystemsInventors: Alireza Marandi, Yoshihisa Yamamoto, Robert Byer, Zhe Wang, Shoko Utsunomiya
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Publication number: 20170024658Abstract: 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 ?i+?Jij?j+?Kijk?j?k with respect to ?i) by using a tentative measurement result of oscillation phases ?i(tentative) of the plurality of pseudo spin pulses SPi, and a pseudo spin measuring unit measures the pseudo spins ?i of the plurality of pseudo spin pulses SPi, based on a final measurement result of oscillation phases ?i(steady) of the plurality of pseudo spin pulses SPi.Type: ApplicationFiled: March 25, 2015Publication date: January 26, 2017Inventors: Shoko UTSUNOMIYA, Yoshihisa YAMAMOTO, Hiroki TAKESUE
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Patent number: 9411026Abstract: This computation device and method exponentially shortens a computation time of an NP-complete problem or the like mapped into an Ising model by exponentially shortening a computation time of the Ising mode. For each pair of a plurality of slave lasers, by controlling the intensity, the polarization, and the phase of light exchanged between two slave lasers using an attenuator and a wave plate, the magnitude and the sign of pseudo Ising interaction between two slave lasers are implemented. Then, after the plurality of slave lasers arrive at a steady state, by measuring the polarization of light generated by each slave laser with left-handed circular polarization and right-handed circular polarization used as bases, a pseudo spin of each slave laser is measured.Type: GrantFiled: February 28, 2012Date of Patent: August 9, 2016Assignee: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION, RESEARCH ORGANIZATION OF INFORMATION AND SYSTEMSInventors: Yoshihisa Yamamoto, Shoko Utsunomiya, Kenta Takata, Kai Yan
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Publication number: 20160162798Abstract: In one aspect, a computational machine includes an optical device configured to receive energy from an optical energy source and generate a number N1 of optical signals, and a number N2 of coupling devices, each of which controllably couples a plurality of the number N1 optical signals. The coupling devices are individually controlled to simulate a computational problem. In another aspect, a computational machine includes a number N1 of parametric oscillators and a number N2 of coupling devices, each of which controllably couples a plurality of the number N1 of parametric oscillators together. The coupling devices are individually controlled to simulate a computational problem.Type: ApplicationFiled: July 9, 2014Publication date: June 9, 2016Inventors: Alireza Marandi, Yoshihisa Yamamoto, Robert Byer, Zhe Wang, Shoko Utsunomiya
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Patent number: 9342792Abstract: For each pair of a plurality of slave lasers B for which injection synchronization is performed by a master laser M, by controlling the intensity of light exchanged between two slave lasers B and an optical path length between the two slave lasers B using a slave-to-laser intensity control unit IA and an inter-slave laser optical path length control unit IP, the magnitude and the sign of pseudo ising interaction Jij between the two slave lasers B are implemented. After the plurality of slave lasers B arrive at a steady state, by measuring relative values of the oscillation phases of the plurality of slave lasers B with respect to the oscillation phase of the master laser M by using an oscillation phase measuring unit PM, pseudo ising spins ?i of the plurality of slave lasers B are measured.Type: GrantFiled: November 7, 2013Date of Patent: May 17, 2016Assignees: Inter-University Research Institute Corporation, Research Organization of Information and Systems, The Board of Trustees of the Leland Stanford Junior UniversityInventors: Shoko Utsunomiya, Kenta Takata, Yoshihisa Yamamoto, Kai Wen
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Publication number: 20140200689Abstract: For each pair of a plurality of slave lasers B for which injection synchronization is performed by a master laser M, by controlling the intensity of light exchanged between two slave lasers B and an optical path length between the two slave lasers B using a slave-to-laser intensity control unit IA and an inter-slave laser optical path length control unit IP, the magnitude and the sign of pseudo ising interaction Jij between the two slave lasers B are implemented. After the plurality of slave lasers B arrive at a steady state, by measuring relative values of the oscillation phases of the plurality of slave lasers B with respect to the oscillation phase of the master laser M by using an oscillation phase measuring unit PM, pseudo ising spins ?i of the plurality of slave lasers B are measured.Type: ApplicationFiled: November 7, 2013Publication date: July 17, 2014Applicants: The Board of Trustees of the Leland Stanford Junior University, Inter-University Research Institute Corporation, Research Organization of Information and SystemsInventors: Shoko Utsunomiya, Kenta Takata, Yoshihisa Yamamoto, Kai Wen
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Publication number: 20140046626Abstract: This computation device and method exponentially shortens a computation time of an NP-complete problem or the like mapped into an Ising model by exponentially shortening a computation time of the Ising mode. For each pair of a plurality of slave lasers, by controlling the intensity, the polarization, and the phase of light exchanged between two slave lasers using an attenuator and a wave plate, the magnitude and the sign of pseudo Ising interaction between two slave lasers are implemented. Then, after the plurality of slave lasers arrive at a steady state, by measuring the polarization of light generated by each slave laser with left-handed circular polarization and right-handed circular polarization used as bases, a pseudo spin of each slave laser is measured.Type: ApplicationFiled: February 28, 2012Publication date: February 13, 2014Applicant: Inter-University Research Institute Corporation, Research Organization of Information SystemsInventors: Yoshihisa Yamamoto, Shoko Utsunomiya, Kenta Takata