Probing the vacuum induced coherence in a system
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We propose a simple test to demonstrate and detect the presence of vacuum induced coherence in a system. We show that the probe field absorption is modulated due to the presence of such a coherence which is unobservable in fluorescence. We present analytical and numerical results for the modulated absorption, the cosine and sine components of which display different types of behavior. Copyright 1999 by MANK "Haya/Interperiodica".