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| Author |
Ovchinnikov, Yu. N.; Varlamov, A. A. |
| Title |
Fluctuation-dissipative phenomena in a narrow superconducting channel carrying current below critical |
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Journal Article |
| Year |
2009 |
Publication |
arXiv |
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| Volume |
0910.2659v1 |
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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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arXiv:0910.2659v1; 4 pages, 3 figures |
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931 |
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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 |
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Pages |
303-305 |
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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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Russian |
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Duplicated as 1288 |
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1283 |
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Goltsman, G. |
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Quantum-photonic integrated circuits |
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Conference Article |
| Year |
2019 |
Publication |
Proc. IWQO |
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Proc. IWQO |
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22-23 |
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WSSPD, waveguide SSPD, SNSPD, quantum optics, integrated optics, superconducting nanowire single-photon detector |
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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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1287 |
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Anthore, A.; Pothier, H.; Esteve, D. |
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Density of states in a superconductor carrying a supercurrent |
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Journal Article |
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2003 |
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Phys. Rev. Lett. |
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Phys. Rev. Lett. |
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90 |
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12 |
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127001 (1 to 4) |
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Usadel, superconducting nanowire |
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We have measured the tunneling density of states (DOS) in a superconductor carrying a supercurrent or exposed to an external magnetic field. The pair correlations are weakened by the supercurrent, leading to a modification of the DOS and to a reduction of the gap. As predicted by the theory of superconductivity in diffusive metals, we find that this effect is similar to that of an external magnetic field. |
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Recommended by Klapwijk |
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no |
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924 |
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Dauler, Eric; Kerman, Andrew; Robinson, Bryan; Yang, Joel; Voronov, Boris; Goltsman, Gregory; Hamilton, Scott; Berggren, Karl |
| Title |
Photon-number-resolution with sub-30-ps timing using multi-element superconducting nanowire single photon detectors |
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Journal Article |
| Year |
2009 |
Publication |
J. Modern Opt. |
Abbreviated Journal |
J. Modern Opt. |
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56 |
Issue |
2 |
Pages |
364-373 |
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PNR SSPD; SNSPD; photon-number-resolution; superconducting nanowire single photon detector; timing jitter; system detection efficiency |
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A photon-number-resolving detector based on a four-element superconducting nanowire single photon detector is demonstrated to have sub-30-ps resolution in measuring the arrival time of individual photons. This detector can be used to characterize the photon statistics of non-pulsed light sources and to mitigate dead-time effects in high-speed photon counting applications. Furthermore, a 25% system detection efficiency at 1550 nm was demonstrated, making the detector useful for both low-flux source characterization and high-speed photon-counting and quantum communication applications. The design, fabrication and testing of this detector are described, and a comparison between the measured and theoretical performance is presented. |
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RPLAB @ gujma @ |
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700 |
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