Interference Is More Complex Than Quantum Physicists Thought (IMAGE)

University of Warsaw, Faculty of Physics

Interference Is More Complex Than Quantum Physicists Thought

Caption

Even an individual photon can travel along both arms of the interferometer at the same time. When it is unknown which path it is travelling along, we observe interference and the appearance of interference fringes. A strong signal is visible where the crests of light waves meet, and a weak signal is obtained at the meeting point of the troughs. If it is possible to determine which arm the photon travelled along, following leakage of information from the interferometer, the fringes disappear.

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NLTK/Tentaris/Maciej Frolow

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