Experimentally accessing the optimal temporal mode of traveling quantum light states
arXiv:1307.6364 · doi:10.1103/PhysRevLett.111.213602
Abstract
The characterization or subsequent use of propagating optical quantum state requires the knowledge of its precise temporal mode. Defining this mode structure very often relies on a detailed a priori knowledge of the used resources, when available, and can additionally call for an involved theoretical modeling. In contrast, here we investigate a practical method enabling to infer the optimal temporal mode directly from experimental data acquired via homodyne detection, without any assumptions on the state. The approach is based on a multimode analysis using eigenfunction expansion of the autocorrelation function. This capability is illustrated by experimental data from Fock states and Schrodinger cat-like state preparation.
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