Physics – Quantum Physics
Scientific paper
2007-02-06
Physics
Quantum Physics
Scientific paper
Stimulated emission of two photons is observed experimentally in the parametric amplification process and is compared to a three-photon interference scheme. We find that the underlying physics of stimulated emission is simply the constructive interference due to photon indistinguishability. So the observed signal enhancement upon the input of photons is a result of multi-photon interference of the input photons and the otherwise spontaneously emitted photon from the amplifier.
Gong Yan-Xiao
Guo Guang-Can
Huang Yun-Feng
Liu Bao Hua
Ou Zhe Yu
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