Picture from Nothing: Silence Paints Ghosts ⚡ экспресс
Classical ghost imaging requires the correlation of two beams: a signal beam (without spatial resolution) and a reference beam (with resolution). A new experiment overturns conventional wisdom: the image is recovered when no photons interact with the object. All light-hit events are discarded; only time intervals without photons are used. This paradoxical method is dubbed 'ghost imaging with zero photons.' The secret lies in special quantum measurements and the statistics of thermal light. The result helps clarify the fine line between quantum and classical correlations.
A drummer stays silent, but from the pauses you can tell where he didn’t hit. Similarly, physicists built an image by catching not light, but moments of absolute darkness. The picture emerged from silence.
The trick lies in the mysterious statistics of thermal light, which Roy Glauber studied in the 1960s. Bright spots on the object less often fall into complete darkness. By analyzing the frequency of "zero" events, they reconstruct the silhouette. Thus silence becomes more eloquent than noise, and the boundary between quantum and classical physics vanishes.
🎯 The term 'ghost imaging' arose because the picture seems to float separately from the illuminating beam — just like a ghost.