Patents by Inventor Yasumoto Tanaka
Yasumoto Tanaka 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: 20230003813Abstract: Proposed is a phase shift introduction method, a structure, and a circuit device for eliminating or minimizing a risk associated with dissimilar materials, solving in principle a problem of mixing of a signal current and a control current that occurs due to DC connection of a phase shifter to a signal line, and stably and reliably providing a phase shift that is desired to be introduced without being adversely effected by noise generated by an ambient magnetic field, which is generated due to use of an external power supply. A structure according to the present invention includes a phase shifter 101 and a closed-loop circuit 103 that is directly used for computation or storage, and a quantum phase shift is generated in the closed-loop circuit 103 by using a fractional flux quantum captured by the phase shifter 101 that is DC-separated from the closed-loop circuit 103.Type: ApplicationFiled: November 26, 2020Publication date: January 5, 2023Applicants: National Institute of Advanced Industrial Science and Technology, NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tokyo University of Science FoundationInventors: Yasumoto TANAKA, Hirotake YAMAMORI, Takashi YANAGISAWA, Shunichi ARISAWA, Taichiro NISHIO
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Patent number: 8902018Abstract: A control method is proposed that controls inter-component phase difference solitons by using splitting or fusion caused by the interaction between inter-component phase difference solitons themselves, without the need for application of external energy.Type: GrantFiled: February 20, 2009Date of Patent: December 2, 2014Assignees: National Institute of Advanced Industrial Science and Technology, Kagoshima UniversityInventors: Yasumoto Tanaka, Akira Iyo, Dilip Shivagan, Parasharam Shirage, Kazuyasu Tokiwa, Tsuneo Watanabe, Norio Terada
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Publication number: 20110063016Abstract: A control method is proposed that controls inter-component phase difference solitons by using splitting or fusion caused by the interaction between inter-component phase difference solitons themselves, without the need for application of external energy.Type: ApplicationFiled: February 20, 2009Publication date: March 17, 2011Applicant: National Institute of Advanced Ind. Sci & TechInventors: Yasumoto Tanaka, Akia Iyo, Dilip Shivagan, Parasharam Shirage, Kazuyasu Tokiwa, Tsuneo Watanabe, Norio Terada
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Patent number: 7885696Abstract: A method of searching for a material fated to generate an interband phase difference soliton includes the steps of generating an AC in a soliton candidate material, identifying a loss of AC magnetic susceptibility of the siliton candidate material due to a turn and a twist cut of a vortex line and judging whether or not the soliton candidate material is capable of generating soliton.Type: GrantFiled: August 14, 2007Date of Patent: February 8, 2011Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Yasumoto Tanaka, Adrian Crisan, Akira Iyo
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Patent number: 7522078Abstract: The length portion of part of a multiband superconductor line 10 is used as a closed circuit line part Rc that constitutes part of a closed circuit allowing passage of an electric current Io generated by an electric current source 12. Meantime, the line part extending and continuing into the closed circuit line part Rc is used as an open circuit line part Ro adapted to serve as an open circuit regarding the electric current source 12. By keeping the multiband superconductor line 10 under a temperature environment falling short of the critical soliton temperature and injecting a nonequilibrium electric current Io from the electric current source 12 into the closed circuit line part of the multiband superconductor line, it is rendered possible to induce generation of an interband phase different soliton So. The generated interband phase difference soliton So is forwarded as separated from the electric current Io to the open circuit line part Ro and is made to run therein.Type: GrantFiled: August 27, 2007Date of Patent: April 21, 2009Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Yasumoto Tanaka, Akira Iyo, Adrian Crisan, Kazuyasu Tokiwa, Tsuneo Watanabe, Norio Terada
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Publication number: 20080214402Abstract: A method of searching for a material fated to generate an interband phase difference soliton includes the steps of generating an AC in a soliton candidate material, identifying a loss of AC magnetic susceptibility of the siliton candidate material due to a turn and a twist cut of a vortex line and judging whether or not the soliton candidate material is capable of generating soliton.Type: ApplicationFiled: August 14, 2007Publication date: September 4, 2008Applicant: National Inst of Adv Industrial Science and TechInventors: Yasumoto TANAKA, Adrian Crisan, Akira Iyo
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Patent number: 7400282Abstract: A quantum Turing machine constituted using a quantum bit created by localizing a phase difference soliton S between superconducting electrons existing in each of multiple of bands in a ring R0 that includes a ring main body R1 formed of a superconductor, and well-shaped portions W1, W2 formed with a reduced line-width at at least two positions on the ring main body R1, can easily constitute a quantum bit, can surely execute a basic logical operation, has multiple-bit capability and, moreover, can ensure sufficient time for executing a quantum algorithm.Type: GrantFiled: September 2, 2004Date of Patent: July 15, 2008Assignees: National Institute of Advanced Industrial Science and Technology, Japan Science and Technology Agency, Tokyo University of ScienceInventors: Yasumoto Tanaka, Akira Iyo, Norio Terada, Shiro Kawabata, Athinarayan Sundaresan, Naoto Kikuchi, Tsuneo Watanabe, Kazuyasu Tokiwa
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Publication number: 20080051291Abstract: The length portion of part of a multiband superconductor line 10 is used as a closed circuit line part Rc that constitutes part of a closed circuit allowing passage of an electric current Io generated by an electric current source 12. Meantime, the line part extending and continuing into the closed circuit line part Rc is used as an open circuit line part Ro adapted to serve as an open circuit regarding the electric current source 12. By keeping the multiband superconductor line 10 under a temperature environment falling short of the critical soliton temperature and injecting a nonequilibrium electric current Io from the electric current source 12 into the closed circuit line part of the multiband superconductor line, it is rendered possible to induce generation of an interband phase different soliton So. The generated interband phase difference soliton So is forwarded as separated from the electric current Io to the open circuit line part Ro and is made to run therein.Type: ApplicationFiled: August 27, 2007Publication date: February 28, 2008Applicant: Nat Inst of Adv Industrial Sci and TechInventors: Yasumoto Tanaka, Akira Iyo, Adrian Crisan, Kazuyasu Tokiwa, Tsuneo Watanabe, Norio Terada
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Publication number: 20070120727Abstract: A quantum Turing machine constituted using a quantum bit created by localizing a phase difference soliton S between superconducting electrons existing in each of multiple of bands in a ring R0 that includes a ring main body R1 formed of a superconductor, and well-shaped portions W1, W2 formed with a reduced line-width at at least two positions on the ring main body R1, can easily constitute a quantum bit, can surely execute a basic logical operation, has multiple-bit capability and, moreover, can ensure sufficient time for executing a quantum algorithm.Type: ApplicationFiled: September 2, 2004Publication date: May 31, 2007Applicants: National Inst of Adv Industrial Science and Tech., JAPAN SCIENCE AND TECHNOLOGY AGENCY, Tokyo University of ScienceInventors: Yasumoto Tanaka, Akira Iyo, Norio Terada, Shiro Kawabata, Athinarayan Sundaresan, Naoto Kikuchi, Tsuneo Watanabe, Kazuyasu Tokiwa
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Publication number: 20050107262Abstract: A recording method that records information in soliton units, a computing method that performs a computation, an information transmission method, an energy storage method, a magnetic flux measurement method and a quantum bit constitution method utilize the properties of phase solitons manifested between superconducting order parameters present in multiple bands in a superconductor having a multiple bands. The phase difference soliton is maintained, so information can be stored in the form of phase differences. Moreover, ??soliton phase slip will also be present when the same energy is carried in the reverse direction, so the soliton itself can have a + or ? sign. The soliton enables storage of energy not accompanied by magnetic flux. Also, with soliton units, magnetic flux can be measured with greater precision by discriminating external magnetic flux. Moreover, using solitons and anti-solitons makes it possible to constitute quantum bits required in quantum measurements.Type: ApplicationFiled: October 10, 2002Publication date: May 19, 2005Applicant: Nat. Inst. of Advanced Industrial Sci. and TechInventors: Yasumoto Tanaka, Akira Iyo, Kazuyasu Tokiwa
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Publication number: 20030107043Abstract: An electrically conductive high-melting-point oxide light source that can be used in an oxygen-containing atmosphere includes a sintered oxide having as an essential constituent an oxide of an element selected from the group consisting of ruthenium, iridium, rhodium and rhenium. It is used an oxygen-containing atmosphere at a temperature of not less than 1700° C. A high-melting-point conductive paste includes particles of a sintered oxide having as an essential constituent an oxide of an element selected from the group consisting of ruthenium, iridium, rhodium and rhenium, and a binder and solvent. An exhaust gas filter includes a powdered sintered oxide having as an essential constituent an oxide of an element selected from the group consisting of ruthenium, iridium, rhodium and rhenium, the powdered sintered oxide being applied to and baked on, or formed into a heating element and attached to, a surface of a diesel engine exhaust gas filter of ceramic to form a heating element.Type: ApplicationFiled: December 6, 2002Publication date: June 12, 2003Applicant: National Inst. of Advanced Ind. Science and Tech.Inventors: Shinichi Ikeda, Yasumoto Tanaka, Naoki Shirakawa, Hiroshi Bando