Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Ławniczak, Michał"'
We investigate experimentally the undirected open microwave network $\Gamma $ with internal absorption composed of two coupled directed halves, unidirectional networks $\Gamma_{+} $ and $\Gamma_{-} $, corresponding to two possible directions of motio
Externí odkaz:
http://arxiv.org/abs/2409.03493
Autor:
Lawniczak, Michal, Akhshani, Afshin, Farooq, Omer, Bialous, Malgorzata, Bauch, Szymon, Dietz, Barbara, Sirko, Leszek
Publikováno v:
Physical Review E 107, 024203 (2023)
We report on experimental studies of the distribution of the reflection coefficients, and the imaginary and real parts of Wigner's reaction (K) matrix employing open microwave networks with symplectic symmetry and varying size of absorption. The resu
Externí odkaz:
http://arxiv.org/abs/2212.01566
Publikováno v:
Phys. Rev. E 103 (2021), 032208
We investigate experimentally a Fermi golden rule in two-edge and five-edge microwave networks with preserved time reversal invariance. A Fermi golden rule gives rates of decay of states obtained by perturbing embedded eigenvalues of graphs and netwo
Externí odkaz:
http://arxiv.org/abs/2108.05584
We present an extensive experimental study of the distributions of the real and imaginary parts of the off-diagonal elements of the scattering matrix $\hat S$ and the Wigner's reaction $\hat K$-matrix for open microwave networks with broken time ($T$
Externí odkaz:
http://arxiv.org/abs/2007.10659
Autor:
Ławniczak, Michał, Kurasov, Pavel, Bauch, Szymon, Białous, Małgorzata, Yunko, Vitalii, Sirko, Leszek
Publikováno v:
Physical Review E 101, 052320 (2020)
The Euler characteristic $\chi =|V|-|E|$ and the total length $\mathcal{L}$ are the most important topological and geometrical characteristics of a metric graph. Here, $|V|$ and $|E|$ denote the number of vertices and edges of a graph. The Euler char
Externí odkaz:
http://arxiv.org/abs/2007.10654
Publikováno v:
Phys. Rev. Lett. 122 (2019), 140503
One of the most important characteristics of a quantum graph is the average density of resonances, $\rho = \frac{\mathcal{L}}{\pi}$, where $\mathcal{L}$ denotes the length of the graph. This is a very robust measure. It does not depend on the number
Externí odkaz:
http://arxiv.org/abs/1904.06905
Publikováno v:
Phys. Rev. E 98, 01220, 2018
We present an experimental study of missing level statistics of three-dimensional chaotic microwave cavities. The investigation is reinforced by the power spectrum of level fluctuations analysis which also takes into account the missing levels. On th
Externí odkaz:
http://arxiv.org/abs/1903.05198
We present an experimental and numerical study of missing-level statistics of chaotic three-dimensional microwave cavities. The nearest-neighbor spacing distribution, the spectral rigidity, and the power spectrum of level fluctuations were investigat
Externí odkaz:
http://arxiv.org/abs/1810.11368
Autor:
Dietz, Barbara, Yunko, Vitalii, Bialous, Malgorzata, Bauch, Szymon, Lawniczak, Michal, Sirko, Leszek
Publikováno v:
Phys. Rev. E 95, 052202 (2017)
We present experimental and numerical results for the long-range fluctuation properties in the spectra of quantum graphs with chaotic classical dynamics and preserved time-reversal invariance. Such systems are generally believed to provide an ideal b
Externí odkaz:
http://arxiv.org/abs/1704.05049
Autor:
Bialous, Malgorzata, Yunko, Vitalii, Bauch, Szymon, Lawniczak, Michal, Dietz, Barbara, Sirko, Leszek
We investigated experimentally the short- and long-range correlations in the fluctuations of the resonance frequencies of flat, rectangular microwave cavities that contained antennas acting as point-like perturbations. We demonstrate that their spect
Externí odkaz:
http://arxiv.org/abs/1609.09233