| Project/Area Number |
24740260
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Ochanomizu University |
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Principal Investigator |
KITAJIMA Sachiko お茶の水女子大学, 大学院人間文化創成科学研究科, 准教授 (70334571)
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| Research Collaborator |
SHIBATA Fumiaki お茶の水女子大学, 名誉教授 (20011702)
BAN Masashi お茶の水女子大学, 大学院人間文化創成科学研究科, 教授 (50416955)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Keywords | ディコヒーレンス / エンタングルメント / 初期相関 |
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| Research Abstract |
Time evolution of quantum composite systems interacting with environments is studied taking into account initial correlations. Explicitly, we treat the Jaynes-Cummings model and a two-spin model as the relevant quantum composite system. The environment is composed of a set of harmonic oscillators. An initial state of the whole system is considered to be an at most single excitation state. The time evolution of the whole system is exactly solved to give non-equilibrium dynamics of the quantum coherence, entanglement and non-Markovian properties. We also study time evolution of the system with the initial correlation originating from initial preparation effect due to measurement of the quantum state.
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