1/f noise from point process and time-subordinated Langevin equations. (20th May 2016)

• Record Type: Journal Article
• Authors: Ruseckas, J; Kazakevičius, R; Kaulakys, B
• Is Part Of: Journal of statistical mechanics. (2016:May)
• Publication Date: 2016-05-20
• Subjects: Statistical mechanics -- Periodicals; Mechanics -- Statistical methods -- Periodicals; 530.1305
• DOI: 10.1088/1742-5468/2016/05/054022
• Languages: English
• ISSNs: 1742-5468

Abstract

Abstract: Internal mechanism leading to the emergence of the widely occurring 1/ f noise still remains an open issue. In this paper we investigate the distinction between the internal time of the system and the physical time as a source of 1/ f noise. After demonstrating the appearance of 1/ f noise in the earlier proposed point process model, we generalise it starting from a stochastic differential equation which describes a Brownian-like motion in the internal (operational) time. We consider this equation together with an additional equation relating the internal time to the external (physical) time. We show that the relation between the internal time and the physical time that depends on the intensity of the signal can lead to 1/ f noise in a wide interval of frequencies. The present model can be useful for the explanation of the appearance of 1/ f noise in different systems.