459 research outputs found

    Semiclassical Phase Reduction Theory for Quantum Synchronization

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    We develop a general theoretical framework of semiclassical phase reduction for analyzing synchronization of quantum limit-cycle oscillators. The dynamics of quantum dissipative systems exhibiting limit-cycle oscillations are reduced to a simple, one-dimensional classical stochastic differential equation approximately describing the phase dynamics of the system under the semiclassical approximation. The density matrix and power spectrum of the original quantum system can be approximately reconstructed from the reduced phase equation. The developed framework enables us to analyze synchronization dynamics of quantum limit-cycle oscillators using the standard methods for classical limit-cycle oscillators in a quantitative way. As an example, we analyze synchronization of a quantum van der Pol oscillator under harmonic driving and squeezing, including the case that the squeezing is strong and the oscillation is asymmetric. The developed framework provides insights into the relation between quantum and classical synchronization and will facilitate systematic analysis and control of quantum nonlinear oscillators.Comment: 20 pages, 5 figure

    カビ (Aspergillus terreus) におけるトリプトファン代謝の研究

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    金沢大学薬学部研究課題/領域番号:X00090----557486, 研究期間(年度):1980 – 1981出典:「カビ (Aspergillus terreus) におけるトリプトファン代謝の研究」研究成果報告書 課題番号X00090----557486(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-X00090----557486/)を加工して作

    生理活性物質の開発

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    金沢大学薬学部研究課題/領域番号:X00070----843031, 研究期間(年度):1973 – 1974出典:「生理活性物質の開発」研究成果報告書 課題番号:X00070----843031(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-X00070----843031/)を加工して作

    黴(Oospora, SP)の代謝物の生合成について

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    金沢大学薬学部研究課題/領域番号:X42440----750080, 研究期間(年度):1967出典:研究課題「黴(Oospora, SP)の代謝物の生合成について」課題番号X42440----750080(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-X42440----750080/)を加工して作

    阻害剤利用によるかびの代謝物の生合成研究

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    金沢大学薬学部研究課題/領域番号:X46090-----87170, 研究期間(年度): 1971出典:研究課題「阻害剤利用によるかびの代謝物の生合成研究」課題番号 X46090-----87170(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-X46090-----87170/)を加工して作

    空気中の黴( Aspfumigatus CH 413)の代謝産物について

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    金沢大学薬学部研究課題/領域番号:X41440----750076, 研究期間(年度):1966出典:研究課題「空気中の黴( Aspfumigatus CH 413)の代謝産物について」課題番号X41440----750076(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-X41440----750076/)を加工して作

    METEOROLOGICAL DATA AT MIZUHO STATION, ANTARCTICA IN 1984

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    Extensive Bilateral Patellar Tendon Ossification in a Spinal Cord Injury Patient

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    This is the first report of extensive bilateral patellar tendon ossification occurring over a prolonged time after a unilateral knee injury. An 84-year-old Japanese man with a spinal cord injury caused by a burst fracture of the T12 vertebra presented with a bony hard prominence on the left knee, which was injured in a traffic accident when he was 77 years old. Radiography revealed extensive ossification of the bilateral patellar tendons. We review the English literature with a focus on the localization of bilateral heterotopic ossification of the knee in patients who had a central nervous system injury
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