Nonlinear Dynamics and Nanophysics Laboratory

Head of the laboratory prof., habil. dr. Kęstutis Pyragas 
phone +370 5 2626739 prof., habil. dr. Kęstutis Pyragas

The laboratory performs theoretical investigations in the fields of nonlinear dynamics and nanophysics. The analysis of nonlinear systems is a complicated problem, because they do not satisfy the superposition principle.  Even very simple nonlinear systems may reveal chaotic behaviour. Chaos is usually an undesired phenomenon and one needs to develop the control algorithms in order to overcome it. Now the methods of nonlinear dynamics are widely used in such fields as biology and medicine. For example, it has been revealed that the Parkinsonian decease arises due to the pathological synchronization of a certain type of neurons. This synchronization can be suppressed by external or feedback signals. The laboratory deals with development of algorithms for the desynchronization of neural networks.
The reduction in the dimensions of semiconductor devices is the mainstream of the progress of semiconductor electronics over many past decades. The typical dimensions of the state-of-art devices are in the nanometric scale. In this dimension scale, the semiclassical physics becomes not valid, and one has to recourse to the quantum mechanics. Semiconductor devices are widely used for generation and detection of electromagnetic radiation. Currently the terahertz (1012 Hz) frequency range is one of the key topics of semiconductor electronics. The theoretical studies of the emitters and detectors of the terahertz radiation are underway in the Laboratory by using the methods of numerical simulation.