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TRANSITION FOR FINITE GLOBALLY COUPLED OSCILLATORS DRIVEN BY ADDITIVE AND MULTIPLICATIVE NOISES 下载免费PDF全文
We study an ensemble of N globally coupled oscillators driven simultaneously by additive and multiplicative noises. By numerical simulation we find that for this model there is the same transition in the dynamics of the mean field when the coupling constant is increased as the one proposed by Pikovsky et al. (Z.Phys. B95(1994),541). The effect of the multiplicative noises on the transition is that when the multiplicative noise strength D1 is small, the effect of the multiplicative noises on the transition is feeble; but with the increase of D1 the transition is strongly influenced near a special value D′1 of D1; then with the increase of D1 when the value of D1 is larger than a critical value D10, the transition disappears. By some approximation we obtain the critical value D(1)0 of D1. 相似文献
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引言实验是物理科学的基础.实验工作对于物理学的发展是至关重要的.但从实验课题的提出,方案的制订到具体实验的设计,以及对实验结果的分析,都离不开理性思维,也就是离不开从理论角度进行考虑.正如爱因斯坦所强调:“是理论决定着观察什么”.因此,一个好的实验工作者固然应当熟练掌握有关的实验技术,但尤其要具有清晰的物理概念并能够进行透澈的理性思维.随着现代实验设备的大型化和自动化,计算机的应用和计算技术的发展在实验工作中也起着越来越重要的作用.实验条件的精确规定,实验数据的快速获取和自动处理,都依赖于计算机和相应计算程序的帮助.许多情况下,计算机上的模拟计算可以部分代替昂贵的真实实验,或在实际不可能进行实验时给出可能的结果. 相似文献
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本文采用Weinbaum波函数与显含电子相关坐标的Jastrow相关因子的乘积作为氢分子的变分波函数,在微扰论的框架下计算了Cross构型的H_2-H_2系统在van der Waals极小值附近的势能曲线。 相似文献
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