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Bardeen, J.; Cooper, L. N.; Schrieffer, J. R. |
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Title |
Microscopic theory of superconductivity |
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1957 |
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Phys. Rev. |
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Phys. Rev. |
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106 |
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162-164 |
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BCS |
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900 |
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Author |
Cooper, L. N. |
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Title |
Bound electron pairs in a degenerate fermi gas |
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Journal Article |
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Year |
1956 |
Publication |
Phys. Rev. |
Abbreviated Journal |
Phys. Rev. |
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Volume |
104 |
Issue |
4 |
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1189-1190 |
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899 |
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Minaeva, Olga; Bonato, Cristian; Saleh, Bahaa E. A.; Simon, David S.; Sergienko, Alexander V. |
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Title |
Odd- and even-order dispersion cancellation in quantum interferometry |
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Journal Article |
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Year |
2009 |
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Phys. Rev. Lett. |
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Phys. Rev. Lett. |
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Volume |
102 |
Issue |
10 |
Pages |
4 |
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Abstract |
We describe a novel effect involving odd-order dispersion cancellation. We demonstrate that odd- and even-order dispersion cancellation may be obtained in different regions of a single quantum interferogram using frequency-anticorrelated entangled photons and a new type of quantum interferometer. This offers new opportunities for quantum communication and metrology in dispersive media. |
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RPLAB @ gujma @ |
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699 |
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Sidorova, M.; Semenov, Alexej D.; Hübers, H.-W.; Ilin, K.; Siegel, M.; Charaev, I.; Moshkova, M.; Kaurova, N.; Goltsman, G. N.; Zhang, X.; Schilling, A. |
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Title |
Electron energy relaxation in disordered superconducting NbN films |
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Journal Article |
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2020 |
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Phys. Rev. B |
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Phys. Rev. B |
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102 |
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5 |
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054501 (1 to 15) |
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NbN SSPD, SNSPD, HEB, bandwidth, relaxation time |
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We report on the inelastic-scattering rate of electrons on phonons and relaxation of electron energy studied by means of magnetoconductance, and photoresponse, respectively, in a series of strongly disordered superconducting NbN films. The studied films with thicknesses in the range from 3 to 33 nm are characterized by different Ioffe-Regel parameters but an almost constant product qTl (qT is the wave vector of thermal phonons and l is the elastic mean free path of electrons). In the temperature range 14–30 K, the electron-phonon scattering rates obey temperature dependencies close to the power law 1/τe−ph∼Tn with the exponents n≈3.2–3.8. We found that in this temperature range τe−ph and n of studied films vary weakly with the thickness and square resistance. At 10 K electron-phonon scattering times are in the range 11.9–17.5 ps. The data extracted from magnetoconductance measurements were used to describe the experimental photoresponse with the two-temperature model. For thick films, the photoresponse is reasonably well described without fitting parameters, however, for thinner films, the fit requires a smaller heat capacity of phonons. We attribute this finding to the reduced density of phonon states in thin films at low temperatures. We also show that the estimated Debye temperature in the studied NbN films is noticeably smaller than in bulk material. |
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1266 |
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Shah, Nayana; Pekker, David; Goldbart, Paul M. |
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Title |
Inherent stochasticity of superconductor-resistor switching behavior in nanowires |
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2008 |
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Phys. Rev. Lett. |
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Phys. Rev. Lett. |
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Volume |
101 |
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207001(1 to 4) |
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Keywords |
superconducting nanowires, phase-slip, self-heating effect, temperature profile |
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We study the stochastic dynamics of superconductive-resistive switching in hysteretic current-biased superconducting nanowires undergoing phase-slip fluctuations. We evaluate the mean switching time using the master-equation formalism, and hence obtain the distribution of switching currents. We find that as the temperature is reduced this distribution initially broadens; only at lower temperatures does it show the narrowing with cooling naively expected for phase slips that are thermally activated. We also find that although several phase-slip events are generally necessary to induce switching, there is an experimentally accessible regime of temperatures and currents for which just one single phase-slip event is sufficient to induce switching, via the local heating it causes. |
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919 |
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