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Mon 19 Mar, 2012 03:31 am
Consider a one-dimensional anharmonic oscillator U(x) = 1/2*m*\omega_0^2 + 1/3*m*a*x^3+1/4*m*b*x^4. By using perturbation approach calculate the amplitude of the third-order displacement and nonlinear polarization at the frequency \omega.