Single-photon excitation of a coherent state: catching the elementary step of stimulated light emission

Details Single-photon excitation of a coherent state: catching the elementary step of stimulated light emission Single-photon excitation of a coherent state: catching the elementary step of stimulated light emission

2005-08-12

arxiv.org/abs/quant-ph/0508094v1

Phys. Rev. A 72, 023820 (2005)

Physics

Quantum Physics

9 pages, 9 figures. Accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.72.023820

When a single quantum of electromagnetic field excitation is added to the same spatio-temporal mode of a coherent state, a new field state is generated that exhibits intermediate properties between those of the two parents. Such a single-photon-added coherent state is obtained by the action of the photon creation operator on a coherent state and can thus be regarded as the result of the most elementary excitation process of a classical light field. Here we present and describe in depth the experimental realization of such states and their complete analysis by means of a novel ultrafast, time-domain, quantum homodyne tomography technique clearly revealing their non-classical character.

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