Scientists at University of Toronto have reported experimental evidence of “negative time” in quantum interactions using weak measurements.
By tracking photons moving through an atomic cloud, they observed effects consistent with atoms remaining excited for a mathematically negative duration—without violating causality.
The result suggests that time at the quantum level behaves statistically and counterintuitively, challenging classical notions of temporal flow.
Beyond its conceptual impact, this work may influence future developments in quantum computing and deepen the idea that time is not fundamental, but emergent from underlying physical processes.
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