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Dissipative contributions of internal multiplicative noise

Author

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  • Lindenberg, Katja
  • Seshadri, V.

Abstract

Langevin equations for closed systems with multiplicative fluctuations must also include appropriate dissipative terms that ensure eventual equilibration of the system. We consider an oscillator coupled to a heat bath and show that a particular nonlinear coupling to a harmonic heat bath leads to a fluctuating frequency and to nonlinear dissipative terms. We also analyze the effects of the multiplicative fluctuations and of the corresponding nonlinear dissipation on the temporal evolution of the average oscillator energy. We find that the rate of equilibration of this system can be significantly different from that of an oscillator with only additive fluctuations and linear dissipation.

Suggested Citation

  • Lindenberg, Katja & Seshadri, V., 1981. "Dissipative contributions of internal multiplicative noise," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 109(3), pages 483-499.
    • Handle: RePEc:eee:phsmap:v:109:y:1981:i:3:p:483-499
    DOI: 10.1016/0378-4371(81)90007-8
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