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Wyszukujesz frazę "Savin, D." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Statistics of Conductance and Shot-Noise Power for Chaotic Cavities
Autorzy:
Sommers, H.-J.
Wieczorek, W.
Savin, D. V.
Powiązania:
https://bibliotekanauki.pl/articles/2047832.pdf
Data publikacji:
2007-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.23.-b
73.50.Td
05.45.Mt
73.63.Kv
Opis:
We report on an analytical study of the statistics of conductance, g, and shot-noise power, p, for a chaotic cavity with arbitrary numbers N$\text{}_{1,2}$ of channels in two leads and symmetry parameterβ = 1, 2, 4. With the theory of Selberg's integral the first four cumulants of g and first two cumulants of p are calculated explicitly. We give analytical expressions for the conductance and shot-noise distributions and determine their exact asymptotics near the edges up to linear order in distances from the edges. For 0 < g < 1 a power law for the conductance distribution is exact. All results are also consistent with numerical simulations.
Źródło:
Acta Physica Polonica A; 2007, 112, 4; 691-697
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probing Eigenfunction Nonorthogonality by Parametric Shifts of Resonance Widths
Autorzy:
Savin, D.
De Vaulx, J.
Powiązania:
https://bibliotekanauki.pl/articles/1399049.pdf
Data publikacji:
2013-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
05.45.Mt
05.60.Gg
Opis:
Recently, it has been shown that the change of resonance widths in an open system under a perturbation of its interior is a sensitive indicator of the nonorthogonality of resonance states. We apply this measure to quantify parametric motion of the resonances. In particular, a strong redistribution of the widths is linked with the maximal degree of nonorthogonality. Then for weakly open chaotic systems we discuss the effect of spectral rigidity on the statistical properties of the parametric width shifts, and derive the distribution of the latter in a picket-fence model with equidistant spectrum.
Źródło:
Acta Physica Polonica A; 2013, 124, 6; 1074-1077
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluctuations and Correlations in Scattering on a Resonance Coupled to a Chaotic Background
Autorzy:
Savin, D.
Powiązania:
https://bibliotekanauki.pl/articles/1030015.pdf
Data publikacji:
2017-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Mt
03.65.Nk
05.60.Gg
24.60.-k
Opis:
We discuss and briefly overview recent progress with studying fluctuations in scattering on a resonance state coupled to the background of many chaotic states. Such a problem arises naturally, e.g., when dealing with wave propagation in the presence of a complex environment. Using a statistical model based on random matrix theory, we obtain a number of nonperturbative results for various statistics of scattering characteristics. This includes the joint and marginal distributions of the reflection and transmission intensities and phases, which are derived exactly at arbitrary coupling to the background with finite absorption. The intensities and phases are found to exhibit highly non-trivial statistical correlations, which remain essential even in the limit of strong absorption. In the latter case, we also consider the relevant approximations and their accuracy. As an application, we briefly discuss the statistics of the phase rigidity (or mode complexness) in such a scattering situation.
Źródło:
Acta Physica Polonica A; 2017, 132, 6; 1688-1694
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation Functions of Impedance and Scattering Matrix Elements in Chaotic Absorbing Cavities
Autorzy:
Savin, D. V.
Fyodorov, Y. V.
Sommers, H.-J.
Powiązania:
https://bibliotekanauki.pl/articles/2044586.pdf
Data publikacji:
2006-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Mt
24.60.-k
42.25.Bs
03.65.Nk
Opis:
Wave scattering in chaotic systems with a uniform energy loss (absorption) is considered. Within the random matrix approach we calculate exactly the energy correlation functions of different matrix elements of impedance or scattering matrices for systems with preserved or broken time-reversal symmetry. The obtained results are valid at any number of arbitrary open scattering channels and arbitrary absorption. Elastic enhancement factors (defined through the ratio of the corresponding variance in reflection to that in transmission) are also discussed.
Źródło:
Acta Physica Polonica A; 2006, 109, 1; 53-64
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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