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Author |
Perrin, N.; Vanneste, C. |
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Title |
Response of superconducting films to a periodic optical irradiation |
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1983 |
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Phys. Rev. B |
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28 |
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9 |
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5150-5159 |
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sc_resp_Perrin_1983 |
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233 |
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Shytov, A. V.; Levitov, L. S.; Beenakker, C. W. J. |
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Title |
Electromechanical noise in a diffusive conductor |
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Journal Article |
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2002 |
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Phys. Rev. Lett. |
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Phys. Rev. Lett. |
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88 |
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22 |
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Electrons moving in a conductor can transfer momentum to the lattice via collisions with impurities and boundaries, giving rise to a fluctuating mechanical stress tensor. The root-mean-squared momentum transfer per scattering event in a disordered metal (of dimension L greater than the mean free path l and screening length xi) is found to be reduced below the Fermi momentum by a factor of order l/L for shear fluctuations and (xi/L)^2 for pressure fluctuations. The excitation of an elastic bending mode by the shear fluctuations is estimated to fall within current experimental sensitivity for a nanomechanical oscillator. |
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0031-9007 |
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RPLAB @ s @ |
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433 |
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Bulaevskii, L. N.; Graf, M. J.; Batista, C. D.; Kogan, V. G. |
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Title |
Vortex-induced dissipation in narrow current-biased thin-film superconducting strips |
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Journal Article |
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2011 |
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Phys. Rev. B |
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Phys. Rev. B |
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83 |
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14 |
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9 |
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A vortex crossing a thin-film superconducting strip from one edge to the other, perpendicular to the bias current, is the dominant mechanism of dissipation for films of thickness d on the order of the coherence length ξ and of width w much narrower than the Pearl length Λâ‰<ab>wâ‰<ab>ξ. At high bias currents I*<I<Ic the heat released by the crossing of a single vortex suffices to create a belt-like normal-state region across the strip, resulting in a detectable voltage pulse. Here Ic is the critical current at which the energy barrier vanishes for a single vortex crossing. The belt forms along the vortex path and causes a transition of the entire strip into the normal state. We estimate I* to be roughly Ic/3. Furthermore, we argue that such “hot†vortex crossings are the origin of dark counts in photon detectors, which operate in the regime of metastable superconductivity at currents between I* and Ic. We estimate the rate of vortex crossings and compare it with recent experimental data for dark counts. For currents below I*, that is, in the stable superconducting but resistive regime, we estimate the amplitude and duration of voltage pulses induced by a single vortex crossing. |
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RPLAB @ gujma @ |
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688 |
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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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2009 |
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Phys. Rev. Lett. |
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Phys. Rev. Lett. |
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102 |
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10 |
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4 |
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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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699 |
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Author |
Usadel, Klaus D. |
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Title |
Generalized diffusion equation for superconducting alloys |
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1970 |
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Phys. Rev. Lett. |
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Phys. Rev. Lett. |
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25 |
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8 |
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507 |
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Eilenberger's transportlike equations for a superconductor of type II can be simplified very much in the dirty limit. In this limit a diffusionlike equation is derived which is the generalization of the de Gennes-Maki theory for dirty superconductors to arbitrary values of the order parameter. |
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