| Project/Area Number |
24340093
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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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 | Oita University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
Orihara Hiroshi 北海道大学, 工学研究科, 教授 (30177307)
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| Co-Investigator(Renkei-kenkyūsha) |
Nara Shigetoshi 岡山大学, 自然科学研究科, 特命教授 (60231495)
Hidaka Yoshiki 九州大学, 工学研究院, 助教 (70274511)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2012: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Keywords | 確率共鳴 / 液晶 / 光フィードバック / 非線形動力学 / ソフトマター / 物性基礎 / パターン形成 |
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| Outline of Final Research Achievements |
Stochastic resonance (SR) is widely observed in nonlinear bistable systems with noise and a weak sinusoidal signal. A liquid crystal light valve (LCLV) with optical feedback, which shows an optical bistable property. Then, we have tried to observe the SR in this system.
Firstly, the optical circuit to observe the SR was constructed. The light coming from the reading side of the LCLV is fed back to the writing side by an optical fiber. The amplitude of driving voltage was modified by the weak sinusoidal signal with noise. The state of director in the LCLV, was measured by a photomultiplier. To avoid spatial inhomogeneity, a pinhole was used
The internal time scale of a system affects the appearance of SR. To clarify the relationship between the relaxation time of the director and the appearance of SR, we added colored noises. Under suitable conditions, the SR was confirmed which agrees a numerical simulation.
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