Tohoku Univ. Technology : Self shunted flux type super conducting quantum circuit element : T22-242
Realization of high performance, highly integrated quantum computer by increased coherence time, anharmonicity, and reduced footprint of qubit
The superconducting quantum bit is composed of a single or multiple superconducting tunnel junctions (Josephson junctions). Research and development of typical charge type and magnetic flux type qubits are active. The current mainstream of high integration is Transmon, a modified version of the charge type, which has advantage of long coherence time, but has disadvantage of small anharmonicity, which can cause error. On the other hand, the magnetic flux type has advantage of large anharmonicity, but has disadvantage of short coherence time. Adding a shunt capacitor to increase coherence time causes increased footprint (the area occupied by a single qubit). This invention solves above problem, and it is about a technology that can achieve high integration with a small footprint while maintaining a practically tolerable coherence time and anharmonicity.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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