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VOLUME 46 (1987) | ISSUE 4 | PAGE 134
Disruption of quantum coherence upon a change in spatial topology in quantum gravity
Quantum coherence may be disrupted when closed universes of Planckian size split off from a plane space. The observation of K° — K° oscillations imposes a restriction on the amplitude for such processes. This amplitude must be strongly suppressed in comparison with the dimensional estimate Mt.