Spectral Asymptotics and Lamé Spectrum for Coupled Particles in Periodic Potentials
Spectral Asymptotics and Lamé Spectrum for Coupled Particles in Periodic Potentials
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周期势耦合粒子的谱渐近和拉梅谱
DOI:
10.1007/s10884-021-10108-z
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发表时间:
2022
影响因子:
1.3
通讯作者:
Zhou, Jing
中科院分区:
文献类型:
--
作者:
Kim, Ki Yeun;Levi, Mark;Zhou, Jing
We make two observations on the motion of coupled particles in a periodic potential. Coupled pendula, or the space-discretized sine-Gordon equation is an example of this problem. Linearized spectrum of the synchronous motion turns out to have a hidden asymptotic periodicity in its dependence on the energy; this is the gist of the first observation. Our second observation is the discovery of a special property of the purely sinusoidal potentials: the linearization around the synchronous solution is equivalent to the classical Lamè equation. As a consequence,all but one instability zones of the linearized equation collapse to a point for the one-harmonic potentials. This provides a new example where Lamé’s finite zone potential arises in the simplest possible setting.
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DOI:
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发表时间:
2010
期刊:
NIST Handbook of Mathematical Functions
影响因子:
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作者:
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通讯作者:
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1941
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