Effects of Periodic Forcing Amplitude on the Spiral Wave Resonance Drift  

作　　者：吴宁杰 李炳伟 应和平 

机构地区：[1]Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027

出　　处：《Chinese Physics Letters》2006年第8期2030-2033,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 90303010 and 10405020.

摘　　要：We study dynamics of spiral waves under a uniform periodic temporal forcing in an excitable medium. With a specific combination of frequency and amplitude of the external periodic forcing, a resonance drift of a spiral wave occurs along a straight line, and it is accompanied by a complicated ‘flower-like＇ motion on each side of this bifurcate boundary line. It is confirmed that the straight-line drift frequency of spiral waves is not locked to the nature rotation frequency as the forcing amplitude expends are further verified numerically for a simplified kinematical the range of the spiral wave frequency. These results model.We study dynamics of spiral waves under a uniform periodic temporal forcing in an excitable medium. With a specific combination of frequency and amplitude of the external periodic forcing, a resonance drift of a spiral wave occurs along a straight line, and it is accompanied by a complicated ‘flower-like＇ motion on each side of this bifurcate boundary line. It is confirmed that the straight-line drift frequency of spiral waves is not locked to the nature rotation frequency as the forcing amplitude expends are further verified numerically for a simplified kinematical the range of the spiral wave frequency. These results model.

关 键 词：EXCITABLE MEDIA CARDIAC FIBRILLATION DYNAMICS TRANSITION KINEMATICS TURBULENCE PATTERNS MODEL 

分 类 号：O41[理学—理论物理]