Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Martti M. Salomaa"'
The contributors of this volume are working at the forefront of various realizations of quantum computers. They survey the recent developments in each realization, in the context of the DiVincenzo criteria, including nuclear magnetic resonance, Josep
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 51:343-351
In this work, we study numerically the operation of surface acoustic wave (SAW) reflectors comprising a small number of electrodes on the 128/spl deg/ YX-cut lithium niobate (LiNbO/sub 3/) substrate. The electrodes have a finite thickness, and they a
Publikováno v:
Scopus-Elsevier
Alastalo, A T, Stenberg, M P V & Salomaa, M M 2004, ' Response functions of an artificial Anderson atom in the atomic limit ', Journal of Low Temperature Physics, vol. 134, no. 3-4, pp. 897-924 . https://doi.org/10.1023/B:JOLT.0000013208.27930.57
Alastalo, A T, Stenberg, M P V & Salomaa, M M 2004, ' Response functions of an artificial Anderson atom in the atomic limit ', Journal of Low Temperature Physics, vol. 134, no. 3-4, pp. 897-924 . https://doi.org/10.1023/B:JOLT.0000013208.27930.57
We consider the spin and pseudospin (charge) response functions of the exactly soluble Anderson atom model. We demonstrate, in particular, that a deviation from the magnetic Curie-law behaviour, appropriate for a free spin one-half, increases with in
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 50:972-978
In this work, we study theoretically the operation of long surface acoustic wave reflectors, comprising a large number of electrodes, at the fundamental and second harmonic frequencies on the 128/spl deg/ LiNbO/sub 3/ substrate for various electrode
Autor:
Antti V. Räisänen, Jussi Säily, Ville Viikari, Juha Mallat, Janne Salo, Martti M. Salomaa, Johanna Meltaus, Janne Häkli, Tomi Koskinen, Anne Lönnqvist, Eero Noponen, Juha Ala-Laurinaho
Publikováno v:
Meltaus, J, Salo, J, Noponen, E, Salomaa, M M, Viikari, V, Lönnqvist, A, Koskinen, T, Säily, J, Häkli, J, Ala-Laurinaho, J, Mallat, J & Räisänen, A V 2003, ' Millimeter-wave beam shaping using holograms ', IEEE Transactions on Microwave Theory and Techniques, vol. 51, no. 4 I, pp. 1274-1280 . https://doi.org/10.1109/TMTT.2003.809679
We synthesize amplitude- and phase-type computer-generated holograms (diffractive gratings) for shaping millimeter-wave fields. We design holograms using quasi-optical back-propagation and rigorous optimization methods adopted from diffractive optics
Autor:
S. M. M. Virtanen, Martti M. Salomaa
Publikováno v:
Computer Physics Communications. 142:391-395
We present an efficient computational method to solve selfconsistently the Bogoliubov–de Gennes equations of weak coupling superconductivity. As a function of system size, the scaling of the CPU time required by the scheme is shown to be preferable
Publikováno v:
Computer Physics Communications. 142:396-400
We compute using a microscopic mean-field theory the structure and the quasiparticle excitation spectrum of a dilute, trapped Bose–Einstein condensate penetrated by an axisymmetric vortex line. The Gross–Pitaevskii equation for the condensate and
Publikováno v:
Journal of Physics A: Mathematical and General. 34:9319-9327
Nondiffracting pulses are spatially and temporally localized wave fields that undergo no diffractive spreading under propagation through homogeneous media. We introduce an orthogonality condition for nondiffracting pulses and present an orthogonal se
Autor:
Janne Salo, Martti M. Salomaa
Publikováno v:
Journal of Optics A: Pure and Applied Optics. 3:366-373
We consider periodically propagating pulses, devoid of diffractive spreading. They may feature arbitrary velocities of propagation but their spectral characteristics vary according to whether they are luminal, subluminal or superluminal. The wave mod
Autor:
Janne Salo, Martti M. Salomaa
Publikováno v:
Acoustics Research Letters Online. 2:31-36
We introduce subsonic nondiffracting waves which—unlike the ordinary supersonic nondiffracting waves—evolve periodically under propagation. Such pulse-like waves have a subsonic uniformly propagating ‘core’, which is modulated by a supersonic