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Il Nuovo Cimento D

, 8:553 | Cite as

Single-photon interference experiment using a mechanical frequency shifter

  • R. Calabrese
Article

Summary

A variation of the interference experiment on the single photon has been performed. By means of a mechanical effect, we change the frequency of the photon only on one arm of a Mach-Zender interferometer. We observe the beat signals even when the intensity is so small that only one photon at a time passes through the interferometer. Our experiment gives a further proof of the classical behaviour of the electromagnetic radiation at arbitrarily small intensity, in agreement with the probabilistic interpretation of quantum mechanics.

PACS. 78.20

Optical properties and materials 

PACS. 78.90

Other topics in optical properties of condensed matter other interactions of matter with particles and radiation 

Riassunto

È stata realizzata una variante dell'esperimento d'interferenza del singolo fotone. Variando, mediante un effetto meccanico, la frequenza del fotone soltanto in uno dei due bracci di un interferometro di Mach-Zender, si osservano segnali di battimento anche quando l'intensità è così bassa che solo un fotone per volta attraversa l'interferometro. Questo esperimento dà un'ulteriore dimostrazione del comportamento classico della radiazione elettromagnetica ad intensità arbitrariamente ppicole, in accordo con l'interpretazione probabilistica della meccanica quantistica.

Резюме

Осуществлен вариант интерференционного эксперимента с одним фотоном. С помощью механического эффекта мы изменяем частоту фотона в одном из плеч интерферометра Маха-Цендера. Мы наблюдаем сигналы биения даже в том случае, когда интенсивность настолько мала, что только один фотонодновременно проходит через интерферометр. Наш эксперимент указывает на классическое поведение электромагнитного излучения при произвольномалых интенсивностях, что согласуегся с вероятностной интерпретацией квантовой механики.

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Copyright information

© Società Italiana di Fisica 1986

Authors and Affiliations

  • R. Calabrese
    • 1
    • 2
  1. 1.Dipartimento di Fisica dell'UniversitàFerrara
  2. 2.Istituto Nazionale di Fisica Nucleare-Gruppo di FerraraFerraraItalia

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