1/f noise in a one-dimensional charge density wave system

The current noise in a classical one-dimensional charge density wave system is studied in the weak pinning regime by solving the overdamped equation of motion numerically. At low temperatures and just above the zero-temperature depinning threshold, the power spectrum of the current noise S(f) was found to scale with frequency f as S(f) similar to f(-gamma), where gamma approximate to 1, suggesting the existence of flicker noise. Our result is in agreement with experimental findings for quasi-one-dimensional charge density wave systems and provides the first evidence of 1/f behavior obtained from first principles.