49,247 research outputs found

    Stabilized parametric Cooper-pair pumping in a linear array of coupled Josephson junctions

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    We present an experimentally realizable stabilized charge pumping scheme in a linear array of Cooper-pair boxes. The system design intrinsically protects the pumping mechanism from severe errors, especially current reversal and spontaneous charge excitation. The quantum Zeno effect is implemented to further diminish pumping errors. The characteristics of this scheme are considered from the perspective of improving the current standard. Such an improvement bears relevence to the closure of the so-called measurement triangle (see D. Averin [Nature 434, 285 (2005)]).Comment: Title changed, other corrections and modifications requested from Phys. Rev. Let

    Dispersive wave runup on non-uniform shores

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    Historically the finite volume methods have been developed for the numerical integration of conservation laws. In this study we present some recent results on the application of such schemes to dispersive PDEs. Namely, we solve numerically a representative of Boussinesq type equations in view of important applications to the coastal hydrodynamics. Numerical results of the runup of a moderate wave onto a non-uniform beach are presented along with great lines of the employed numerical method (see D. Dutykh et al. (2011) for more details).Comment: 8 pages, 6 figures, 18 references. This preprint is submitted to FVCA6 conference proceedings. Other author papers can be downloaded at http://www.lama.univ-savoie.fr/~dutykh

    Faculty concert: a concert in celebration of the 200th birthday of Franz Schubert

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    This is the concert program of the Faculty Concert: A Concert in Celebration of the 200th Birthday of Franz Schubert performance on Tuesday, February 18, 1997 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue. Works performed were Adagio in E-flat major, D. 897 ("Notturno"), Der Fischer, D. 225, Selige Welt, D. 743, Auf dem See, D. 543, Der Jungling and der Quelle, D. 300, Wie Ulfru fischt, D. 881, Der Jungling am Bache, D. 638, Fischerweise, D. 881, Erlafsee, D. 586, Der Schiffer, D. 536, Auf dem Wasser zu Singen, D. 774, Der Fluss, D. 693, Die Forelle, D. 550, and Piano Trio in E-flat major, D. 929, all by Franz Schubert. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

    Early Music Series Concert: A Schubert Birthday Concert, January 27, 1997

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    This is the concert program of the Early Music Series Concert: A Schubert Birthday Concert on Monday, January 27, 1997 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue. Works performed were the following by Franz Schubert: Der Alpenjäger, Die Forelle, Der Wanderer, Der Atlas, Sonatina for Violin and Piano in D major, Op. 137 No. 1, D. 384, An die Musik, Gesänge des Harfners I, Gesänge des Harfners II, Rastlose Liebe, Gretchen am Spinnrade, Auf dem See, D. 543, Der Tod und das Mädchen, D. 531, Im Frühling, D. 882, Auf der Bruck, D. 853, Allegro in A minor ("Lebensstürme") for piano four hands, D. 947, Duet "Nur wer die Sehnsucht kennt," and Trio "Das Abendroth." Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

    Self-similar transmission properties of aperiodic Cantor potentials in gapped graphene

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    We investigate the transmission properties of quasiperiodic or aperiodic structures based on graphene arranged according to the Cantor sequence. In particular, we have found self-similar behaviour in the transmission spectra, and most importantly, we have calculated the scalability of the spectra. To do this, we implement and propose scaling rules for each one of the fundamental parameters: generation number, height of the barriers and length of the system. With this in mind we have been able to reproduce the reference transmission spectrum, applying the appropriate scaling rule, by means of the scaled transmission spectrum. These scaling rules are valid for both normal and oblique incidence, and as far as we can see the basic ingredients to obtain self-similar characteristics are: relativistic Dirac electrons, a self-similar structure and the non-conservation of the pseudo-spin. This constitutes a reduction of the number of conditions needed to observe self-similarity in graphene-based structures, see D\'iaz-Guerrero et al. [D. S. D\'iaz-Guerrero, L. M. Gaggero-Sager, I. Rodr\'iguez-Vargas, and G. G. Naumis, arXiv:1503.03412v1, 2015]
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