Intramolecular vibrational dynamical barrier due to extremely irrational couplings |
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| Authors: | Ou Shu-Ching and Wu Guo-Zhen |
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| Affiliation: | Molecular and Nano Sciences Laboratory, Department of Physics, Tsinghua University, Beijing 100084, China |
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| Abstract: | The intramolecular vibrational dynamics due to extremely irrationalcouplings is demonstrated by contrast to the resonance couplings, forthe three-mode case of H$_2$O as an example. The extremelyirrational couplings are shown to impose such strong hindrance tointramolecular vibrational relaxation (IVR) that they act asbarriers. They restrict the direct action/energy transfer between thetwo stretching modes, though they allow the transfer between astretching and a bending modes. In contrast, the resonance is moremediated by the bending mode and leads to chaotic IVR. It is alsoshown that there is a region in the dynamical space in whichresonance and extremely irrational couplings coexist. |
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| Keywords: | intramolecular vibrational relaxation extremelyirrational couplings resonance |
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