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Wyświetlanie 1-15 z 27
Tytuł:
The Wavefunctions and Energy Eigenvalues of the Schrodinger Equation for Different Potentials Due to the Virial Theorem
Autorzy:
Arslan, H.
Hulaguhanoglu, N.
Powiązania:
https://bibliotekanauki.pl/articles/1194111.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
03.65.Sq
03.65.-w
83.10.Ff
Opis:
The derivation of the virial theorem is presented both in classical and quantum mechanical approach. The kinetic energy and potential energy of the mechanical energy is converted to each other due to the virial theorem. Some of the different potentials are considered. For some of these potentials, the wavefunctions and energy eigenvalues of the Schrödinger Equation are derived.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 914-916
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Semi-Relativistic Scattering States of the Hulthén and Hyperbolic-Type Potentials
Autorzy:
Hassanabadi, H.
Yazarloo, B.
Hassanabadi, S.
Zarrinkamar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1399494.pdf
Data publikacji:
2013-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Pm
03.65.Nk
Opis:
In this paper, the scattering states of the spinless-Salpeter equation are investigated for Hulthén and hyperbolic-type potentials for any arbitrary l-state. Approximate analytical formulae of the wave functions and the scattering phase shifts are reported.
Źródło:
Acta Physica Polonica A; 2013, 124, 1; 20-22
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Relativistic Transmission and Reflection Coefficients for Woods-Saxon Potential
Autorzy:
Yazarloo, B.
Mehraban, H.
Powiązania:
https://bibliotekanauki.pl/articles/1398910.pdf
Data publikacji:
2016-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
03.65.Ge
03.65.Pm
Opis:
The relativistic problem of spin-1/2 particles subject to the Woods-Saxon potential is investigated by using the functional analysis method. We obtain scattering and bound state solutions of the one-dimensional Dirac equation with the Woods-Saxon potential in terms of the Jacobi polynomials. We also calculated the transmission and reflection coefficients by using behavior of the wave functions at infinity.
Źródło:
Acta Physica Polonica A; 2016, 129, 6; 1089-1092
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Elastic Collision of Two H-Like Atoms Including the Exotic Ps and Mu
Autorzy:
Ray, H.
Powiązania:
https://bibliotekanauki.pl/articles/1030031.pdf
Data publikacji:
2017-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
36.10.Dr
03.65.Nk
34.50.Cx
Opis:
Elastic collision between two H-like atoms using the ab initio static-exchange model (SEM) and a modified static-exchange model (MSEM) at cold energies are investigated in the center of mass frame considering the system as a four-body Coulomb problem where all the Coulomb interaction terms in the direct and exchange channels are treated exactly. The importance of an exact calculation to find basic physics is highlighted. In addition, the dependence of scattering length on the van der Waals interaction between the atoms and the dependence of scattering length on reduced-mass of the system are derived which is completely new information in the field of science.
Źródło:
Acta Physica Polonica A; 2017, 132, 5; 1473-1477
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scattering Properties of Chaotic Microwave Billiards
Autorzy:
Stöckmann, H.
Powiązania:
https://bibliotekanauki.pl/articles/1585125.pdf
Data publikacji:
2009-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
05.45.Mt
Opis:
Reflection and transmission measurements in microwave billiards with attached antennas allow the determination of all components of the scattering matrix including their phases. This is an extraordinary situation, since in usual scattering experiments in nuclear or atomic physics only reduced information such as the scattering cross-section can be obtained where the phase information is completely lost. This allows experimental tests of theoretical predictions of scattering theory inaccessible by any other method. As an example the distribution of reflection coefficients and of the line widths in a chaotic microwave billiard are discussed.
Źródło:
Acta Physica Polonica A; 2009, 116, 5; 783-789
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scattering of Elastic Waves in a Quasi-One-Dimensional Cavity: Theory and Experiment
Autorzy:
Báez, G.
Cobián-Suárez, M.
Martínez-Argüello, A.
Martínez-Mares, M.
Méndez-Sánchez, R.
Powiązania:
https://bibliotekanauki.pl/articles/1399047.pdf
Data publikacji:
2013-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
46.40.Cd
62.30.+d
03.65.Nk
73.21.Fg
Opis:
We study the scattering of torsional waves through a quasi-one-dimensional cavity both from the experimental and theoretical points of view. The experiment consists of an elastic rod with square cross-section. In order to form a cavity, a notch at a certain distance of one end of the rod was grooved. To absorb the waves, at the other side of the rod, a wedge, covered by an absorbing foam, was machined. In the theoretical description, the scattering matrix S of the torsional waves was obtained. The distribution of S is given by Poisson's kernel. The theoretical predictions show an excellent agreement with the experimental results. This experiment corresponds, in quantum mechanics, to the scattering by a delta potential, in one dimension, located at a certain distance from an impenetrable wall.
Źródło:
Acta Physica Polonica A; 2013, 124, 6; 1069-1073
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relativistic Scattering States of the Hellmann Potential
Autorzy:
Yazarloo, B.
Mehraban, H.
Hassanabadi, H.
Powiązania:
https://bibliotekanauki.pl/articles/1398666.pdf
Data publikacji:
2015-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
03.65.Pm
Opis:
In this letter, the scattering state solutions of the Dirac equation for spin and pseudospin symmetries are obtained for the Hellmann potential. The normalized wave functions and scattering phase shifts are calculated for both spin and pseudospin symmetries. Scattering properties for Coulomb-like and Yukawa-like potentials are also studied as limiting cases.
Źródło:
Acta Physica Polonica A; 2015, 127, 3; 684-688
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pseudo-Orbit Expansion for the Resonance Condition on Quantum Graphs and the Resonance Asymptotics
Autorzy:
Lipovský, J.
Powiązania:
https://bibliotekanauki.pl/articles/1189973.pdf
Data publikacji:
2015-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Ge
03.65.Nk
02.10.Ox
Opis:
In this note we explain the method how to find the resonance condition on quantum graphs, which is called pseudo-orbit expansion. In three examples with standard coupling we show in detail how to obtain the resonance condition. We focus on non-Weyl graphs, i.e. the graphs which have fewer resonances than expected. For these graphs we explain benefits of the method of "deleting edges" for simplifying the graph.
Źródło:
Acta Physica Polonica A; 2015, 128, 6; 968-973
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:
Persistent Currents and Bethe Ansatz
Autorzy:
Kiršanskas, G.
Matulis, A.
Powiązania:
https://bibliotekanauki.pl/articles/1505510.pdf
Data publikacji:
2011-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Gk
03.65.Nk
Opis:
The system of two electrons interacting with a single impurity in 1D metallic ring is considered illustrating the applicability of the Bethe Ansatz.
Źródło:
Acta Physica Polonica A; 2011, 119, 2; 158-160
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Spectral Gap for Laplacians on Metric Graphs
Autorzy:
Kurasov, P.
Powiązania:
https://bibliotekanauki.pl/articles/1399045.pdf
Data publikacji:
2013-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
73.63.-b
85.35.-p
Opis:
We discuss lower and upper estimates for the spectral gap of the Laplace operator on a finite compact connected metric graph. It is shown that the best lower estimate is given by the spectral gap for the interval with the same total length as the original graph. An explicit upper estimate is given by generalizing Cheeger's approach developed originally for Riemannian manifolds.
Źródło:
Acta Physica Polonica A; 2013, 124, 6; 1060-1062
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Scattering of Neutron in the Magnetic Field οf 180° Bloch Wall
Autorzy:
Sazonov, S.
Powiązania:
https://bibliotekanauki.pl/articles/1538632.pdf
Data publikacji:
2010-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
03.75.Be
75.60.Ch
02.30.Gp
Opis:
The exact solution of the Pauli equation has been derived for neutron wave propagating in magnetized continuum containing the magnetization non-uniformity such as the 180° Bloch wall, whose structure corresponds to the Landau-Lifshitz model. The scattering coefficients with and without neutron spin flip are presented as functions of ratio of neutron energy to the media's magnetic induction value. The possibility of narrow (≲100 Å) domain wall width measurement is discussed by the example of $YFe_{11}Ti$ alloy.
Źródło:
Acta Physica Polonica A; 2010, 117, 3; 449-453
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Inverse Problem for Quantum Graphs with One Cycle
Autorzy:
Kurasov, P.
Powiązania:
https://bibliotekanauki.pl/articles/1585121.pdf
Data publikacji:
2009-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
73.63.-b
85.35.-p
Opis:
Quantum graphs having one cycle are considered. It is shown that if the cycle contains at least three vertices, then the potential on the graph can be uniquely reconstructed from the corresponding Titchmarsh-Weyl function (Dirichlet-to-Neumann map) associated with graph's boundary, provided certain non-resonant conditions are satisfied.
Źródło:
Acta Physica Polonica A; 2009, 116, 5; 765-771
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical and Experimental Studies of the Elastic Enhancement Factor for 2D Open Systems
Autorzy:
Ławniczak, M.
Białous, M.
Yunko, V.
Bauch, S.
Sirko, L.
Powiązania:
https://bibliotekanauki.pl/articles/1400561.pdf
Data publikacji:
2015-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.Mt
03.65.Nk
Opis:
We present the results of numerical and experimental studies of the elastic enhancement factor W for microwave rough and rectangular cavities simulating two-dimensional chaotic and partially chaotic quantum billiards in the presence of moderate absorption. We show that for the frequency range ν=15.0-18.5 GHz, in which the coupling between antennas and the system is strong enough, the values of W for the microwave rough cavity lie below the predictions of random matrix theory and on average above the theoretical results of V. Sokolov and O. Zhirov, Phys. Rev. E 91, 052917 (2015). We also show that for the partially chaotic rectangular billiard the enhancement factor W calculated by applying the Potter-Rosenzweig model with κ=2.8±0.5 is close to the experimental one.
Źródło:
Acta Physica Polonica A; 2015, 128, 6; 974-978
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light Localization in Left-Handed Media
Autorzy:
Rusek, M.
Orłowski, A.
Mostowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2047827.pdf
Data publikacji:
2007-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Nk
41.20.Jb
72.10.Fk
72.15.Rn
Opis:
Localized waves in disordered left-handed materials are studied using a generalized coupled-dipole model. Resonances in an open system consisting of randomly distributed electric and magnetic dipoles are investigated. A new type of long-lived resonance modes localized at the boundary of the system is found. They resemble evanescent waves responsible for a superfocusing phenomenon by a left-handed lens.
Źródło:
Acta Physica Polonica A; 2007, 112, 4; 673-680
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 27

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