Indications of Universal Excess Fluctuations in Nonequilibrium Systems

Abstract

The fluctuation in electric current in nonequilibrium steady states is investigated by molecular dynamics simulation of macroscopically uniform conductors. At low frequencies, appropriate decomposition of the spectral intensity of current into thermal and excess fluctuations provides a simple picture of excess fluctuations behaving as shot noise. This indicates that the fluctuation-dissipation relation may be violated in a universal manner by the appearance of shot noise for a wide range of systems with particle or momentum transport.

4 pages, 4 figures; title changed, major revision; to appear in J. Phys. Soc. Jpn

References in corpus (2)

• Kinetic theory of fluctuations in conducting systems
• Long-time tail in an electric conduction system

Cited by in corpus (5)

• General properties of response functions of nonequilibrium steady states
• Universal Properties of Nonlinear Response Functions of Nonequilibrium Steady States
• Macroscopic Quantum Violation of Fluctuation-Dissipation Theorem in Equilibrium
• Robustness of equilibrium off-diagonal current fluctuation against localization of electron states in macroscopic two-dimensional systems
• Nonequilibrium Molecular Dynamics Simulation of Interacting Many Electrons Scattered by Lattice Vibrations