Wszystkie pola: Gajda, J - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Harmonically Trapped Classical Gas under Critical Rotation
Autorzy:: Chwedeńczuk, J.
Ziń, P.
Trippenbach, M.
Dąbrowska, B.
Gajda, M.
Rzążewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/2036976.pdf
Data publikacji:: 2003-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 03.75.-b
03.75.Fi
Opis:: We study one- and two-dimensional systems of two interacting particles in a time dependent harmonic potential. In a case of one-dimensional geometry a frequency of the potential varies periodically, while in the two-dimen- sional~case the harmonic potential rotates with a constant angular velocity. We show that depending on the driving frequency the distance between the particles can either explode or stay bound. Repulsive interaction can prevent the explosion, which seems quite counter-intuitive. Our work is related to Ecole Normale Supérieure experiment and shows that the effect found there is purely classical.
Źródło:: Acta Physica Polonica A; 2003, 104, 5; 399-407
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Soluble Model of Interacting Bosons Trapped in Harmonic Potential: Quality of Bogoliubov Approximation
Autorzy:: Załuska-Kotur, M.
Gajda, M.
Mostowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/2028887.pdf
Data publikacji:: 2001-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 03.75.Fi
05.30.Fk
Opis:: We study a system of trapped bosonic particles interacting by model harmonic forces. Our model allows for a detailed examination of the notion of an order parameter (a condensate wave function). By decomposing a single particle density matrix into coherent eigenmodes we study an effect of interaction on the condensate. We show that sufficiently strong interactions cause that the condensate disappears even if the whole system is in its lowest energy state. In the second part of our paper we discuss the validity of the Bogoliubov approximation by comparing its predictions with results inferred from the exactly soluble model. In particular we examine an energy spectrum, occupation, and fluctuations of the condensate. We conclude that Bogoliubov approach gives a quite accurate description of the system in the limit of weak interactions.
Źródło:: Acta Physica Polonica A; 2001, 100, 4; 485-504
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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