The excitation spectrum in a weakly interacting bose gas

Autor:	Z. Kanokov, Nizom Taylanov, S Kh Urinov
Rok vydání:	2020
Předmět:	Condensed Matter::Quantum Gases Physics Bose gas Condensed Matter::Other Spectrum (functional analysis) Atomic physics Excitation
Zdroj:	IOP Conference Series: Materials Science and Engineering. 862:022049
ISSN:	1757-899X 1757-8981
DOI:	10.1088/1757-899x/862/2/022049
Popis:	In the work the problem of phenomenon of superfluidity is considered within the framework of Bose-Einshtein condensation, theoretically. We discuss the main features of the excitation spectrum in a weakly interacting Bose gas. Our analysis will show that the healing length, which determines the length scale below which collective phenomena are physically more relevant than free-particle-like ones. Since the weakly interacting gas of Bose particles has been mapped onto a gas of noninteracting quasiparticles, we are able to analyze the thermodynamics of the system and find how temperature affect the depletion of the condensate.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::80e8d51fbfabdc6ce52a5901c8ab5f65 https://doi.org/10.1088/1757-899x/862/2/022049 Zobrazit plný text záznamu