Instant single-photon Fock state tomography

S. R. Huisman , Nitin Jain , S. A. Babichev , Frank Vewinger , A. N. Zhang , S. H. Youn , A. I. Lvovsky

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classification 🪐 quant-ph

keywords statefocksingle-photontomographyalignmentallowedanalysisapparatus

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Heralded single photons are prepared at a rate of ~100 kHz via conditional measurements on polarization-nondegenerate biphotons produced in a periodically poled KTP crystal. The single-photon Fock state is characterized using high frequency pulsed optical homodyne tomography with a fidelity of (57.6 +- 0.1)%. The state preparation and detection rates allowed us to perform on-the-fly alignment of the apparatus based on real-time analysis of the quadrature measurement statistics.

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Instant single-photon Fock state tomography

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