Abstract
In a two-electron atom, autoionization from an impulsive isolated core excitation is a sensitive probe of a Rydberg electronic wave packet. This probe via the electron-electron correlation allows a quantum measurement of the wave function to be made. In addition to this capability, the measurement process has the advantage that it is independent of the excitation process. An analytical formula describes this probe. This formula is used in conjunction with a nonlinear least-squares algorithm to reconstruct the wave function of this wave packet. The algorithm is relatively insensitive to noise. With 20% added Gaussian noise, the algorithm can still reproduce the amplitudes and phases of the wave function.
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