Photon-number resolution with microwave Josephson photomultipliers
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Le résumé fourni par la source
We study counting photons confined in a mode of a microwave resonator via repeated measurements by a Josephson photomultiplier (JPM). The considered JPM is essentially a flux-biased phase qubit operating as a single-photon detector. We identify optimal operational regimes that maximize photon-number resolution within a predetermined range. Two counting techniques are studied. The first is to count the total number of clicks in the measurement sequence. The second involves counting the number of clicks until the occurrence of either the first no-click event or the end of the measurement sequence. Our theoretical methods employ the derived positive operator-valued measures for the considered photocounting techniques and the introduced measure of the photon-number resolution. The results reveal that the resolution decrease in both cases is mainly caused by the JPM relaxation. As an example, we show how the obtained results can be used for practical testing nonclassical properties of electromagnetic radiation in a microwave resonator.
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Où se fait cette recherche
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National Academy of Sciences of Ukraine pays non établi dans la noticeOrganisme public
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Bogolyubov Institute for Theoretical Physics pays non établi dans la noticeStructure de recherche
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Institute of Physics pays non établi dans la noticeStructure de recherche
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Kyiv Academic University Department of Theoretical and Mathematical Physics pays non établi dans la noticeUniversité ou école supérieure
National Academy of Sciences of Ukraine, Bogolyubov Institute for Theoretical Physics et Institute of Physics, avec 1 autre affiliation.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.