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- W4238926238 abstract "We study the classical field limit of non-relativistic many-boson theories in space dimensionn≧3. When ħ→0, the correlation functions, which are the averages of products of bounded functions of field operators at different times taken in suitable states, converge to the corresponding functions of the appropriate solutions of the classical field equation, and the quantum fluctuations are described by the equation obtained by linearizing the field equation around the classical solution. These properties were proved by Hepp [6] for suitably regular potentials and in finite time intervals. Using a general theory of existence of global solutions and a general scattering theory for the classical equation, we extend these results in two directions: (1) we consider more singular potentials, (2) more important, we prove that for dispersive classical solutions, the ħ→0 limit is uniform in time in an appropriate representation of the field operators. As a consequence we obtain the convergence of suitable matrix elements of the wave operators and, if asymptotic completeness holds, of theS-matrix." @default.
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- W4238926238 date "1979-02-01" @default.
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- W4238926238 title "The classical field limit of scattering theory for non-relativistic many-boson systems. I" @default.
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- W4238926238 doi "https://doi.org/10.1007/bf01197745" @default.
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