Published January 1, 1993
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FLUCTUATIONS OF A SPHERICAL GRAVITATIONAL IMPULSIVE WAVE
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Description
It is shown that quantum fluctuations, in particular vacuum polarization, vanish in the background of a spherical impulsive wave solution of the Einstein field equations, recently found by Nutku and Penrose. The calculation is done in first-order perturbation theory but arguments are given why it should persist to all orders.
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