Full derivation of the wave kinetic equation
Full derivation of the wave kinetic equation
复制标题
波动动力学方程的全推导
DOI:
10.1007/s00222-023-01189-2
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发表时间:
2023
影响因子:
3.1
通讯作者:
Hani, Zaher
中科院分区:
文献类型:
--
作者:
Deng, Yu;Hani, Zaher
We provide the rigorous derivation of the wave kinetic equation from the cubic nonlinear Schrödinger (NLS) equationat the kinetic timescale, under a particularscaling lawthat describes the limiting process. This solves a main conjecture in the theory ofwave turbulence, i.e. the kinetic theory of nonlinear wave systems. Our result is the wave analog of Lanford’s theorem on the derivation of the Boltzmann kinetic equation from particle systems, where in both cases one takes the thermodynamic limit as the size of the system diverges to infinity, and as the interaction strength of waves/radius of particles vanishes to 0, according to a particular scaling law (Boltzmann-Grad in the particle case).More precisely, in dimensions, we consider the (NLS) equation in a large box of sizewith a weak nonlinearity of strength. In the limitand, under the scaling law, we show that the long-time behavior of (NLS) is statistically described by the wave kinetic equation, with well justified approximation, up to times that are(i.e. independent ofand) multiples of the kinetic timescale. This is the first result of its kind for any nonlinear dispersive system.
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影响因子:
2.7
作者:
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通讯作者:
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影响因子:
2.4
作者:
Guardia, Marcel
通讯作者:
Guardia, Marcel
DOI:
10.1017/fmp.2021.6
发表时间:
2019-12
期刊:
Forum of Mathematics, Pi
影响因子:
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作者:
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通讯作者:
Yu Deng;Z. Hani
影响因子:
2.2
作者:
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DOI:
10.1016/j.jcp.2007.04.029
发表时间:
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期刊:
J. Comput. Phys.
影响因子:
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作者:
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