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Название статьи EXACT SOLUTIONS FOR THE DISPERSION RELATION OF BOGOLIUBOV MODES LOCALIZED NEAR A TOPOLOGICAL DEFECT- A HARD WALL - IN BOSE-EINSTEIN CONDENSATE
Авторы

Pikhitsa P., Seoul National University, Seoul 151–744, South Korea, peter@snu.ac.kr

Раздел: PHYSICAL SCIENCES
Год 2016 Номер журнала 2 DOI 10.21603/2500-1418-2016-1-2-126-131
Аннотация A Bose-Einstein condensate of bosons with repulsion, described by the Gross-Pitaevskii equation and restricted by an impenetrable «hard wall» (either rigid or flexible) which is intended to suppress the «snake instability» inherent for dark solitons, is considered. The Bogoliubov-de Gennes equations to find the spectra of gapless Bogoliubov excitations localized near the «domain wall» and therefore split from the bulk excitation spectrum of the Bose-Einstein condensate are solved. The «domain wall» may model either the surface of liquid helium or of a strongly trapped Bose-Einstein condensate. The dispersion relations for the surface excitations are found for all wavenumbers along the surface up to the »free-particle» behavior , the latter was shown to be bound to the «hard wall» with some «universal» energy .
Ключевые слова a Bose-Einstein condensate, the Bogoliubov-de Gennes equation, the Gross-Pitaevskii equation
Информация о статье Дата поступления 21 сентября 2016 года
Дата принятия в печать 15 октября 2016 года
Дата онлайн-размещения 30 декабря 2016 года
Выходные данные статьи Pikhitsa P. EXACT SOLUTIONS FOR THE DISPERSION RELATION OF BOGOLIUBOV MODES LOCALIZED NEAR A TOPOLOGICAL DEFECT- A HARD WALL - IN BOSE-EINSTEIN CONDENSATE. Science Evolution, 2016, vol. 1, no. 2, pp. 126-131. doi:10.21603/2500–1418–2016–1–2–126–131.
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Последний выпуск: Science Evolution, Vol. 1, no. 2, 2016