Quantum Spin Systems and Classical Dynamics
| Project/Area Number |
21540381
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 物性基礎論 / 磁性 / 統計力学 / 量子ダイナミクス / 量子古典対応 / 電子スピン共鳴 / 量子臨界現象 / 国際研究者交流 アメリカ合衆国 / 場の理論 / 相転移 |
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| Research Abstract |
For the temperature regime where time evolution of a quantum spin system is described by a classical field theory, spectral shape of the Electron Spin Resonance is determined using classical equation of motion. It is difficult to obtain the spectral shape with other methods. On Heisenberg antiferromagnetic chain under a staggered field, a crossover between paramagnetic and antiferromagnetic resonances, and accompanying change in the spectral shape are demonstrated. Our approach based on the classical equation motion provides insights complimentary to those obtained in other approaches.
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Report
(5 results)
Research Products
(38 results)
