Temat: 32.10.Dk - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Two-Level Atom at Finite Temperature
Autorzy:: Sowiński, T.
Powiązania:: https://bibliotekanauki.pl/articles/1584982.pdf
Data publikacji:: 2009-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 11.10.Wx
32.10.Dk
31.15.ap
32.70.Jz
Opis:: Properties of a two-level atom coupled to the quantized electromagnetic field at finite temperature are determined. The analysis is based on a new method (inspired by quantum electrodynamics) of describing qubits, developed previously at zero temperature. In this paper, we make a generalization to finite temperature by introducing the Matsubara formalism and the temperature propagators. We analyze the spectral properties of different types of propagators and we derive a direct connection between the temperature propagators and the real time propagators. To show the effectiveness of this method, we calculate the temperature dependence of the polarizability of a two-level atom in the lowest order of perturbation theory and we predict an unexpected sharpening of the resonance. The whole discussion is carried out without the rotating wave approximation.
Źródło:: Acta Physica Polonica A; 2009, 116, 6; 994-1005
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Linear and Hyperpolarizabilities of Spiropyran and Derivatives
Autorzy:: Sabra, M.
Powiązania:: https://bibliotekanauki.pl/articles/1808098.pdf
Data publikacji:: 2009-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 31.15.A-
32.10.Dk
33.15.Kr
Opis:: The geometry of spiropyran molecule and its derivatives was found using quasi-Newton methods, Broyden-Fletcher-Goldfarb-Shanno technique. Then ab initio quantum chemical methods were applied to calculate the ground state energies of the closed and open forms of spiropyran for different basis sets. The frequency dependent linear polarizability of spiropyran and derivatives were obtained and plotted. The found absorption peaks are different for the closed and the open structures of the spiropyran molecule.
Źródło:: Acta Physica Polonica A; 2009, 115, 3; 647-652
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Calculation of Linear Electro-Optic Coefficients in La₃Ga₅SiO₁₄ Crystals
Autorzy:: Ftomyn, N.
Shopa, Ya.
Sudak, I.
Powiązania:: https://bibliotekanauki.pl/articles/1030853.pdf
Data publikacji:: 2018-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.20.Jq
32.10.Dk
78.20.Ek
61.50.Ah
Opis:: The values of electronic polarizabilities of La³⁺, Ga³⁺, Si⁴⁺, O²¯ ions are specified using new experimental data about optical activity of La₃Ga₅SiO₁₄ crystals. A calculation technique based on the dipole electron shifting model is applied to estimate linear electrooptic coefficients for the La₃Ga₅SiO₁₄. Wavelength dependences of the both linear electro-optic tensor components r₁₁ and r₄₁ are calculated.
Źródło:: Acta Physica Polonica A; 2018, 133, 4; 933-935
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Electric Dipole Moments of Acetone and of Acetic Acid Measured in Supersonic Expansion
Autorzy:: Dorosh, O.
Kisiel, Z.
Powiązania:: https://bibliotekanauki.pl/articles/1814018.pdf
Data publikacji:: 2007-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 31.15.Ar
32.10.Dk
32.30.Bv
32.60.+i
33.15.Kr
33.1.Mt
33.20.Bx
33.20.Sn
Opis:: Precise values for electric dipole moments of isolated acetone and acetic acid molecules were determined from the Stark effect measurements made on lowest J rotational transitions at conditions of supersonic expansion. The new results are $μ_{tot} =μ_b$ =2.9345(22) D for acetone from measurements on the $1_{11}$← $1_{01}$ transition, and $μ_a$ =0.8631(8), $μ_b$ =1.4345(11), $μ_{tot}$ =1.6741(10) D for acetic acid, from measurements on $1_{11}$ ← $0_{00}$ and $1_{01}$ ← $0_{00}$ transitions. A comparison with previous determinations and with results of quantum chemical calculations is presented.
Źródło:: Acta Physica Polonica A; 2007, 112, S; S-95-S-104
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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