Temat: 02.50.Ng - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Relation of Gutzwiller Variational State with Matrix Model
Autorzy:: Koper, A.
Mucha, M.
Powiązania:: https://bibliotekanauki.pl/articles/1955829.pdf
Data publikacji:: 1997-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 02.70.Lq
02.50.Ng
11.10.-z
71.27.+a
71.10.-w
Opis:: It is shown that mean values of electron operators in variational Gutzwiller state are equal to mean values of corresponding classical quantities calculated by means of a hermitian matrix model. In cases with small number of electrons in the system this property enables exact calculation of the mean values. In case of large number of electrons a simple and effective Monte Carlo method is formulated (within matrix model).
Źródło:: Acta Physica Polonica A; 1997, 91, 2; 391-394
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: On Stability of Frustrated Quantum Magnetic States in Fullerenes
Autorzy:: Koper, A.
Mucha, M.
Powiązania:: https://bibliotekanauki.pl/articles/1964713.pdf
Data publikacji:: 1997-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.70.Wz
61.46.+w
71.10.-w
71.27.+a
75.10.Jm
02.50.Ng
02.70.Lq
Opis:: Gutzwiller variational ground states |Φ$\text{}^{G}$⟩ of π electrons, described by single-band half-filling Hubbard model, were determined for the molecules C$\text{}_{60}$ and C$\text{}_{70}$ and their energies and magnetic properties investigated. To construct these states two types of trial functions were used: generalized spin-density wave |Φ$\text{}_{SD}$⟩ and tight-binding wave |Φ$\text{}_{ΤΒ}$⟩. Our results evidently show that the Gutzwiller state |Φ$\text{}_{TΒ}^{G}$⟩ determined by means of function |Φ$\text{}_{ΤΒ}$⟩ has lower energy than the other investigated variational states |Φ$\text{}_{SD}^{G}$⟩. Mean values of the operators in the Gutzwiller states were calculated using Monte Carlo method.
Źródło:: Acta Physica Polonica A; 1997, 92, 2; 395-398
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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