Tohoku Univ. Technology：Self-shunted flux-type superconducting 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 into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding 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 - Showa Medical University
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