共查询到20条相似文献,搜索用时 9 毫秒
1.
《理论物理通讯》2015,(11)
The Hong-Strogatz(HS) model of globally coupled phase oscillators with attractive and repulsive interactions reflects the fact that each individual(oscillator) has its own attitude(attractive or repulsive) to the same environment(mean Seld).Previous studies on HS model focused mainly on the stable states on Ott-Antonsen(OA)manifold.In this paper,the eigenvalues of the Jacobi matrix of each fixed point in HS model are explicitly derived,with the aim to understand the local dynamics around each fixed point.Phase transitions are described according to reJative population and coupling strength.Besides,the dynamics off OA manifold is studied. 相似文献
2.
In this paper, we study spatially periodic system with infinite
globally coupled oscillators driven by temporal-spatial noise and
subject to a constant force. The results show that the system
exhibits the phenomena of the non-equilibrium phase transition,
transport of particles, and the anomalous hysteresis cycle
for the mean field and the probability current. 相似文献
3.
A model of a hypothetical surface chemical reaction with lateral interactions between adsorbed particles is investigated. It shows stationary, standing, and traveling nanoscale structures which result from the competition between reactions, diffusion, and the phase transition caused by attractive lateral interactions. Internal fluctuations destroy the coherence of traveling structures and lead to a complex dynamics of interacting traveling wave fragments in this system. 相似文献
4.
ZHENGZhi-Gang ZHOUChang-Song 《理论物理通讯》2002,37(4):419-423
Phase locking dynamics in coupled chaotic oscillators is investigated.For chaotic systems with a poorly coherent phase variable,the imperfect phase locking can be observed befor the onset of a complete phase synchronization.The temporal alternations among n:n phase lockings are found,which originate from an overlap of m:n Arnold tongues. 相似文献
5.
Phase synchronization of two linearly coupled Rossler oscillators with parameter misfits is explored.It is found that depending on parameter mismatches,the synchronization of phases exhibits different manners.The synchronization regime can be divided into three regimes.For small mismatches,the amplitude-insensitive regime gives the phase-dominant synchronization; When the parameter misfit increases,the amplitudes and phases of oscillators are correlated,and the amplitudes will dominate the synchronous dynamics for very large mismatches.The lag time among phases exhibits a power law when phase synchronization is achieved. 相似文献
6.
Clustering and synchronization in an array of repulsively coupled phase oscillators are numerically investigated. It is found that oscillators are divided into several clusters according to the symmetry in the structure.Synchronization occurs between oscillators in each cluster, while those oscillators belonging to different clusters remain asynchronous. Such synchronization may collapse for all clusters when the dynamics of only one oscillator is altered properly. The synchronous state may return back after a short period of transient process. This is determined by the strength of the oscillator altered. Its application in the communication of one-to-several is suggested. 相似文献
7.
Clustering and synchronization in an array of repulsively coupled
phase oscillators are numerically investigated. It is found that
oscillators are divided into several clusters according to the
symmetry in the structure. Synchronization occurs between
oscillators in each cluster, while those oscillators belonging to
different clusters remain asynchronous. Such synchronization may
collapse for all clusters when the dynamics of only one oscillator
is altered properly. The synchronous state may return back after a
short period of transient process. This is determined by the
strength of the oscillator altered. Its application in the
communication of one-to-several is suggested. 相似文献
8.
The development and evolution of a Phase-Lock Loop (PLL) system up to the highest frequencies of Backward Wave Oscillators (BWO) is considered starting from the first submillimeter BWO PLL in 1970. Improvements and increase of working range near to Terahertz are followed. Development of the series of commercial BWO-based millimeter wave frequency synthesizers, extension of the BWO PLL beyond Terahertz as well as recent progress in fast millimeter wave frequency synthesizers are described. Applications of BWO PLL systems for physical and technical measurements are discussed and some proposals for the next generation of BWO-based synthesizers are presented. 相似文献
9.
The transport of a spatially periodic system with infinite globally coupled oscillators driven by temporalspatial noises is investigated. The probability current shows that the correlation of the multiplicative noises with the space, the spatial asymmetry, and the coupling among the different oscillators are ingredients for the transport of particles. It is a new phenomenon that the correlation of the multiplicative noises with the space can induce the nonzero flux. 相似文献
10.
HANYin-Xia LIJing-Hui CHENShi-Gang 《理论物理通讯》2003,40(6):665-668
The transport of a spatially periodic system with infinite globally coupled oscillators driven by temporalspatial noises is investigated. The probability current shows that the correlation of the multiplicative noises with the space, the spatial asymmetry, and the coupling among the different oscillators are ingredients for the transport of particles. It is a new phenomenon that the correlation of the multiplicative noises with the space can induce the nonzero flux. 相似文献
11.
We study the Klein-Gordon oscillator in commutative, noncommutative space, and phase space with psudoharmonic potential under magnetic field hence the other choice is studying the Klein-Gordon equation oscillator in the absence of magnetic field. In this work, we obtain energy spectrum and wave function in different situations by NU method so we show our results in tables. 相似文献
12.
We study the Klein-Gordon oscillator in commutative, noncommutative space, and phase space with psudoharmonic potential under magnetic field hence the other choice is studying the Klein-Gordon equation oscillator in the absence of magnetic field. In this work, we obtain energy spectrum and wave function in different situations by NU method so we show our results in tables. 相似文献
13.
ZHENG Zhi-Gang 《理论物理通讯》2001,35(2):137-142
Discrete breathers are generic solutions for the dynamics of nonlinearly coupled oscillators. We show that discrete breathers can be observed in low-dimensional and high-dimensional lattices by exploring the sinusoidally coupled pendulum. Loss of stability of the breather solution is studied. We also find the existence of discrete breather in lattices with parameter mismatches. Breather phase synchronization is exhibited for the coupled chaotic oscillators. 相似文献
14.
Synchronization of Kuramoto phase oscillators arranged in real complex neural networks is investigated. It is shown that the synchronization greatly depends on the sets of natural frequencies of the involved oscillators. The influence of network connectivity heterogeneity on synchronization depends particularly on the correlation between natural frequencies and node degrees. This finding implies a potential application that inhibiting the effects caused by the changes of network structure can be bManced out nicely by choosing the correlation parameter appropriately. 相似文献
15.
CHEN Hai-Ling YANG Jun-Zhong 《理论物理通讯》2009,51(3):460-464
In this work, we investigate the amplitude death in coupled system with small number of nonlinear oscillators. We show how the transitions to the partial and the complete amplitude deathes happen. We also show that the partial amplitude death can be found in globally coupled oscillators either. 相似文献
16.
We study the fluctuation-activated transition process in a system of two coupled forced bistable oscillators with a mismatch σ in the force constants. As the coupling strength μ is increased, the transition pathway undergoes four stages changes from a two-step process with two candidate pathways to a mixture of a two-step pathway and a one-step pathway to a one-step process with also two candidate pathways and then to a one-step process with a single pathway.Interestingly, we find that the total transition rate depends nonmonotonically on σ in the weak coupling: a maximal rate appears in an intermediate magnitude of σ. Moreover, the rate also exhibits an unexpected maximum as a function ofμ. The results are in an excellent agreement with our numerical simulations by forward flux sampling. 相似文献
17.
位相光栅偏振特性的耦合波分析 总被引:1,自引:0,他引:1
基于麦克斯韦方程组和电磁场的边界连续条件,本文导出了位相光栅的严格的矢量耦合波衍射方程,指出了各级次衍射波之间存厢互耦合作用,并分析了光栅的偏振效应,得到光栅在不同偏振方式下的衍射特性,实验测试结果验证了理论分析和正确性。 相似文献
18.
We consider a class of spin systems on ℤ
d
with vector valued spins (S
x
) that interact via the pair-potentials J
x,y
S
x
⋅S
y
. The interactions are generally spread-out in the sense that the J
x,y
's exhibit either exponential or power-law fall-off. Under the technical condition of reflection positivity and for sufficiently
spread out interactions, we prove that the model exhibits a first-order phase transition whenever the associated mean-field
theory signals such a transition. As a consequence, e.g., in dimensions d≥3, we can finally provide examples of the 3-state Potts model with spread-out, exponentially decaying interactions, which
undergoes a first-order phase transition as the temperature varies. Similar transitions are established in dimensions d = 1,2 for power-law decaying interactions and in high dimensions for next-nearest neighbor couplings. In addition, we also
investigate the limit of infinitely spread-out interactions. Specifically, we show that once the mean-field theory is in a
unique “state,” then in any sequence of translation-invariant Gibbs states various observables converge to their mean-field
values and the states themselves converge to a product measure. 相似文献
19.
将几何相位理论应用于非同调谐振子(isotonic oscillator缩写为IO)这类量子系统,运用算符分解方法计算了系统在二态体系的Aharonov-Anandan相位,推广至三态及多态体系,并讨论了AA相位更普遍的计算公式和变化规律. 相似文献