Generation and characterization of quantum states of light

Quantum state production and characterization are fundamental elements for many quantum technological applications. In this paper, we studied the generation of polarization quantum states by interacting light with a Kerr medium and the dependency of the outcome on orthogonal polarization seeding. Starting from coherent states produced by Ti:sapphire laser, interaction with a $^{87}\mathrm{Rb}$ warm vapor cell led to noise compression of $\ensuremath{-}5.2\ifmmode\pm\else\textpm\fi{}0.5\phantom{\rule{0.28em}{0ex}}\mathrm{dB}\phantom{\rule{4pt}{0ex}}(6.4\ifmmode\pm\else\textpm\fi{}0.6\phantom{\rule{0.28em}{0ex}}\mathrm{dB}$ after correction of the detection quantum efficiency). Experimental characterization of the effect of an orthogonal polarization light seed on squeezing is shown to agree with the theoretical model.Quantum state production and characterization are fundamental elements for many quantum technological applications. In this paper, we studied the generation of polarization quantum states by interacting light with a Kerr medium and the dependency of the outcome on orthogonal polarization seeding. Starting from coherent states produced by Ti:sapphire laser, interaction with a $^{87}\mathrm{Rb}$ warm vapor cell led to noise compression of $\ensuremath{-}5.2\ifmmode\pm\else\textpm\fi{}0.5\phantom{\rule{0.28em}{0ex}}\mathrm{dB}\phantom{\rule{4pt}{0ex}}(6.4\ifmmode\pm\else\textpm\fi{}0.6\phantom{\rule{0.28em}{0ex}}\mathrm{dB}$ after correction of the detection quantum efficiency). Experimental characterization of the effect of an orthogonal polarization light seed on squeezing is shown to agree with the theoretical model.

arXiv:2402.04127Physical Review AAug 1, 20242 citations

Creation of Quantum States of Light

Akira Furusawa

SpringerBriefs in mathematical physicsJan 1, 20151 citation

Detector-Independent Verification of Quantum Light

Jan Sperling, William R. Clements, A. Eckstein +9 more

We introduce a method for the verification of nonclassical light which is independent of the complex interaction between the generated light and the material of the detectors. This is accomplished by means of a multiplexing arrangement. Its theoretical description yields that the coincidence statistics of this measurement layout is a mixture of multinomial distributions for any classical light field and any type of detector. This allows us to formulate bounds on the statistical properties of classical states. We apply our directly accessible method to heralded multiphoton states which are detected with a single multiplexing step only and two detectors, which are in our work superconducting transition-edge sensors. The nonclassicality of the generated light is verified and characterized through the violation of the classical bounds without the need for characterizing the used detectors.We introduce a method for the verification of nonclassical light which is independent of the complex interaction between the generated light and the material of the detectors. This is accomplished by means of a multiplexing arrangement. Its theoretical description yields that the coincidence statistics of this measurement layout is a mixture of multinomial distributions for any classical light field and any type of detector. This allows us to formulate bounds on the statistical properties of classical states. We apply our directly accessible method to heralded multiphoton states which are detected with a single multiplexing step only and two detectors, which are in our work superconducting transition-edge sensors. The nonclassicality of the generated light is verified and characterized through the violation of the classical bounds without the need for characterizing the used detectors.

arXiv:1701.07640Physical Review LettersApr 21, 201729 citations

Generation and tomographic analysis of quantum states of light

Zavatta A., Valentina Parigi, Bellini M.

Jan 1, 20080 citations

Generation and tomographic analysis of novel quantum light states

Zavatta A., Viciani S., Valentina Parigi +1 more

Jan 1, 20050 citations

^{87}\mathrm{Rb}

warm vapor cell led to noise compression of $\ensuremath{-}5.2\ifmmode\pm\else\textpm\fi{}0.5\phantom{\rule{0.28em}{0ex}}\mathrm{dB}\phantom{\rule{4pt}{0ex}}(6.4\ifmmode\pm\else\textpm\fi{}0.6\phantom{\rule{0.28em}{0ex}}\mathrm{dB}$ after correction of the detection quantum efficiency). Experimental characterization of the effect of an orthogonal polarization light seed on squeezing is shown to agree with the theoretical model.