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Author | Ovchinnikov, Yu. N.; Varlamov, A. A. | ||||
Title | Fluctuation-dissipative phenomena in a narrow superconducting channel carrying current below critical | Type | Journal Article | ||
Year | 2009 | Publication | arXiv | Abbreviated Journal | |
Volume | 0910.2659v1 | Issue | Pages | 1-4 | |
Keywords | superconducting nanowire, resistance calculation | ||||
Abstract | The theory of current transport in a narrow superconducting channel accounting for thermal fluctuations is developed. These fluctuations result in the appearance of small but finite dissipation in the sample. The value of corresponding voltage is found as the function of temperature (close to transition temperature) and arbitrary bias current. It is demonstrated that the value of the activation energy (exponential factor in the Arrenius law) when current approaches to the critical one is proportional to (1-J/Jc)^(5/4). This result is in concordance with the one for the affine phenomenon of the Josephson current decay due to the thermal phase fluctuations, where the activation energy proportional (1-J/J_c)^(3/2)(the difference in the exponents is related to the additional current dependence of the order parameter). Found dependence of the activation energy on current explains the enormous discrepancy between the theoretically predicted before and the experimentally observed broadening of the resistive transition. | ||||
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Notes | arXiv:0910.2659v1; 4 pages, 3 figures | Approved | no | ||
Call Number | Serial | 931 | |||
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Author | Korneev, A.; Divochiy, A.; Marsili, F.; Bitauld, D.; Fiore, A.; Seleznev, V.; Kaurova, N.; Tarkhov, M.; Minaeva, O.; Chulkova, G.; Smirnov, K.; Gaggero, A.; Leoni, R.; Mattioli, F.; Lagoudakis, K.; Benkhaoul, M.; Levy, F.; Goltsman, G. | ||||
Title | Superconducting photon number resolving counter for near infrared applications | Type | Conference Article | ||
Year | 2008 | Publication | Proc. SPIE | Abbreviated Journal | Proc. SPIE |
Volume | 7138 | Issue | Pages | 713828 (1 to 5) | |
Keywords | PNR SSPD; SNSPD; Nanowire superconducting single-photon detector, ultrathin NbN film, infrared | ||||
Abstract | We present a novel concept of photon number resolving detector based on 120-nm-wide superconducting stripes made of 4-nm-thick NbN film and connected in parallel (PNR-SSPD). The detector consisting of 5 strips demonstrate a capability to resolve up to 4 photons absorbed simultaneously with the single-photon quantum efficiency of 2.5% and negligibly low dark count rate. | ||||
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Publisher | Spie | Place of Publication | Editor | Tománek, P.; Senderáková, D.; Hrabovský, M. | |
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Notes | Approved | no | |||
Call Number | 10.1117/12.818079 | Serial | 1241 | ||
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Author | Korneeva, Yuliya; Florya, Irina; Vdovichev, Sergey; Moshkova, Mariya; Simonov, Nikita; Kaurova, Natalia; Korneev, Alexander; Goltsman, Gregory | ||||
Title | Comparison of hot-spot formation in NbN and MoN thin superconducting films after photon absorption | Type | Conference Article | ||
Year | 2017 | Publication | IEEE Transactions on Applied Superconductivity | Abbreviated Journal | IEEE Transactions on Applied Superconductiv |
Volume | 27 | Issue | 4 | Pages | 5 |
Keywords | Thin film devices, Superconducitng photoncounting devices, Nanowire single-photon detectors | ||||
Abstract | In superconducting single-photon detectors SSPD the efficiency of local suppression of superconductivity and hotspot formation is controlled by diffusivity and electron-phonon interaction time. Here we selected a material, 3.6-nm-thick MoNx film, which features diffusivity close to those of NbN traditionally used for SSPD fabrication, but with electron-phonon interaction time an order of magnitude larger. In MoNx detectors we study the dependence of detection efficiency on bias current, photon energy, and strip width and compare it with NbN SSPD. We observe non-linear current-energy dependence in MoNx SSPD and more pronounced plateaus in dependences of detection efficiency on bias current which we attribute to longer electronphonon interaction time. |
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Notes | Approved | no | |||
Call Number | RPLAB @ kovalyuk @ | Serial | 1114 | ||
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Author | Елезов, М. С.; Щербатенко, М. Л.; Сыч, Д. В.; Гольцман, Г. Н. | ||||
Title | Практические особенности работы оптоволоконного квантового приемника Кеннеди | Type | Conference Article | ||
Year | 2019 | Publication | Proc. IWQO | Abbreviated Journal | Proc. IWQO |
Volume | Issue | Pages | 303-305 | ||
Keywords | Kennedy quantum receiver, fiber, quantum optics, standard quantum limit, superconducting nanowire single-photon detector, coherent detection | ||||
Abstract | Мы рассматриваем практические особенности работы квантового приемника на основе схемы Кеннеди, собранного из стандартных оптоволоконных элементов и сверхпроводникового детектора одиночных фотонов. Приемник разработан для различения двух фазовомодулированных когерентных состояний света на длине волны 1,5 микрона в непрерывном режиме с частотой модуляции 200 КГц и уровнем ошибок различения примерно в два раза ниже стандартного квантового предела. | ||||
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Language | Russian | Summary Language | Original Title | ||
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Notes | Duplicated as 1288 | Approved | no | ||
Call Number | Serial | 1283 | |||
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Author | Goltsman, G. | ||||
Title | Quantum-photonic integrated circuits | Type | Conference Article | ||
Year | 2019 | Publication | Proc. IWQO | Abbreviated Journal | Proc. IWQO |
Volume | Issue | Pages | 22-23 | ||
Keywords | WSSPD, waveguide SSPD, SNSPD, quantum optics, integrated optics, superconducting nanowire single-photon detector | ||||
Abstract | We show the design, a history of development as well as the most successful and promising approaches for QPICs realization based on hybrid nanophotonic-superconducting devices, where one of the key elements of such a circuit is a waveguide integrated superconducting single-photon detector (WSSPD). The potential of integration with fluorescent molecules is discussed also. | ||||
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Notes | Approved | no | |||
Call Number | Serial | 1287 | |||
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