Zavatta Alessandro, Viciani Silvia, Bellini Marco
Istituto Nazionale di Ottica Applicata, Largo Enrico Fermi, 6, I-50125, Florence, Italy.
Science. 2004 Oct 22;306(5696):660-2. doi: 10.1126/science.1103190.
Single-photon-added coherent states are the result of the most elementary amplification process of classical light fields by a single quantum of excitation. Being intermediate between a single-photon Fock state (fully quantum-mechanical) and a coherent (classical) one, these states offer the opportunity to closely follow the smooth transition between the particle-like and the wavelike behavior of light. We report the experimental generation of single-photon-added coherent states and their complete characterization by quantum tomography. Besides visualizing the evolution of the quantum-to-classical transition, these states allow one to witness the gradual change from the spontaneous to the stimulated regimes of light emission.
单光子加相干态是经典光场通过单个激发量子进行最基本放大过程的结果。这些态介于单光子福克态（完全量子力学态）和相干（经典）态之间，为密切跟踪光的类粒子行为和类波行为之间的平滑过渡提供了机会。我们报告了单光子加相干态的实验生成及其通过量子层析成像的完整表征。除了可视化量子到经典的转变过程外，这些态还使人们能够见证光发射从自发 regime 到受激 regime 的逐渐变化。
