Superfluidity of Bose-Einstein condensates in toroidal traps with nonlinear lattices

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F11%3A00374465" target="_blank" >RIV/67985882:_____/11:00374465 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevA.84.063638" target="_blank" >http://dx.doi.org/10.1103/PhysRevA.84.063638</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevA.84.063638" target="_blank" >10.1103/PhysRevA.84.063638</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Superfluidity of Bose-Einstein condensates in toroidal traps with nonlinear lattices

Popis výsledku v původním jazyce

Superfluid properties of Bose-Einstein condensates (BEC) in toroidal quasi one dimensional traps are investigated in the presence of periodic scattering length modulations along the ring. The existence of several types of stable periodic waves, ranging from almost uniform to very fragmented chains of weakly interacting and equally spaced solitons, is demonstrated. We show that these waves may support persistent atomic currents and sound waves with spectra of Bogoliubov type. Fragmented condensates can be viewed as arrays of Josephson junctions and the current as a BEC manifestation of the dc-Josephson effect. The influence of linear defects on BEC superfluidity has been also investigated. We found that under critical velocities, linear defects that arestatic with respect to the lattice (while the condensate moves in respect to both the optical lattice and the defect) preserve the BEC superfluidity.

Název v anglickém jazyce

Superfluidity of Bose-Einstein condensates in toroidal traps with nonlinear lattices

Popis výsledku anglicky

Superfluid properties of Bose-Einstein condensates (BEC) in toroidal quasi one dimensional traps are investigated in the presence of periodic scattering length modulations along the ring. The existence of several types of stable periodic waves, ranging from almost uniform to very fragmented chains of weakly interacting and equally spaced solitons, is demonstrated. We show that these waves may support persistent atomic currents and sound waves with spectra of Bogoliubov type. Fragmented condensates can be viewed as arrays of Josephson junctions and the current as a BEC manifestation of the dc-Josephson effect. The influence of linear defects on BEC superfluidity has been also investigated. We found that under critical velocities, linear defects that arestatic with respect to the lattice (while the condensate moves in respect to both the optical lattice and the defect) preserve the BEC superfluidity.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

—

Projekt

<a href="/cs/project/OC09060" target="_blank" >OC09060: Teorie a modelování nereciprokých subvlnových struktur a plazmonických vlnovodných systémů</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review. A

ISSN

1050-2947

e-ISSN

—

Svazek periodika

84

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

0636381-0636389

Kód UT WoS článku

000298564400011

EID výsledku v databázi Scopus

—