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On global attraction to quantum stationary states. Dirac equation with mean field interaction

Commun. Math. Anal. Conf.
Conference 3 (2011), 131 - 136

On global attraction to quantum stationary states. Dirac equation with mean field interaction

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Abstract

We consider a U(1)-invariant nonlinear Dirac equation, interacting with itself via the mean field mechanism. We analyze the longtime asymptotics of solutions and prove that, under certain generic assumptions, each finite charge solution converges as t ! ±¥ to the twodimensional set of all “nonlinear eigenfunctions” of the form f (x)e−iwt . This global attraction is caused by the nonlinear energy transfer from lower harmonics to the continuous spectrum and subsequent dispersive radiation. The research is inspired by Bohr’s postulate on quantum transitions and Schr¨odinger’s identification of the quantum stationary states to the nonlinear eigenfunctions of the coupled U(1)-invariant Maxwell-Schr¨odinger and Maxwell-Dirac equations.